"The Quantum Revelation is mind-blowing." --Sting To say that quantum physics is the greatest scientific discovery of all time is not an exaggeration. In their discovery of the quantum realm, the physics community stumbled upon a genuine multifaceted revelation which can be likened to a profound spiritual treasure--a heretofore undreamed of creative power--hidden within our own mind. Quantum physics unequivocally points out that the study of the universe and the study of consciousness are inseparably linked, which (...) is to say that ultimate progress in the one will be impossible without progress in the other. Einstein declared that what it reveals is so immensely important that "it should be everyone's concern." Yet few of us in the general public truly understand how the game-changing discoveries of the past century not only relate to our day-to-day lives, but also give us insights into the nature of reality and our place within it. Written for readers with no physics background, Paul Levy's latest book, The Quantum Revelation: A Radical Synthesis of Science and Spirituality is for those who have heard that quantum physics is a fascinating subject but don't quite understand how or why. Levy contemplates the deeper philosophical underpinnings of quantum physics, exploring the fundamental questions it provokes: What does it mean that quantum theory has discovered that there is no such thing as "objective reality?" How are we participating--via our consciousness--in creating our experience of a reality that quantum theory itself describes as "dreamlike?" What are the implications for us in our day-to-day lives that--as quantum theory reveals--what we call reality is more like a dream that we had previously imagined? The Quantum Revelation is unique in how it synthesizes science and spirituality so as to reveal and explore the dreamlike nature of reality. It is a book not just for people interested in quantum theory, but for anyone who is interested in waking up and dreaming lucidly, be it in our night dreams or our waking life. (shrink)

The aim of this study is to analyse the content of the interdisciplinary conversations in Göttingen between 1949 and 1961. The task is to compare models for describing reality presented by quantum physicists and theologians. Descriptions of reality in different disciplines are conditioned by the development of the concept of reality in philosophy, physics and theology. Our basic problem is stated in the question: How is it possible for the intramental image to match the external object?

Anna Ijjas entwickelt neue Ansatze, indem sie die Unzulanglichkeit gangiger Deutungsversuche aufzeigt, mit dem Ziel, auf diese Weise zum Denken und zum Gesprach anzuregen.

Bohmian mechanics, a hydrodynamic formulation of the quantum theory, constitutes a useful tool to understand the role of the phase as the mechanism responsible for the dynamical evolution displayed by quantum systems. This role is analyzed and discussed here in the context of quantum interference, considering to this end two well-known scenarios, namely Young’s two-slit experiment and Wheeler’s delayed choice experiment. A numerical implementation of the first scenario is used to show how interference in a coherent (...) superposition of two counter-propagating wave packets can be seen and explained in terms of an effective model consisting of a single wave packet scattered off an attractive hard wall. The outcomes from this model are then applied to the analysis of Wheeler’s delayed choice experiment, also recreated by means of a reliable realistic simulation. Both examples illustrate quite well how the Bohmian formulation helps to explain in a natural way aspects of the quantum theory typically regarded as paradoxical. In other words, they show that a proper understanding of quantum phase dynamics immediately removes any trace of unnecessary artificial wave-particle arguments. (shrink)

After a brief account of theway quantum theory deals with naturalprocesses, the crucial problem that such atheory meets, the measurement or, better, themacro-objectification problem is discussed.The embarrassing aspects of the occurrence ofentangled states involving macroscopic systemsare analyzed in details. The famous example ofSchroedinger's cat is presented and it ispointed out how the combined interplay of thesuperposition principle and the ensuingentanglement raises some serious difficultiesin working out a satisfactory quantum worldview, agreeing with our definiteperceptions. The orthodox solution to (...) themacro-objectification problem, i.e. thepostulate of wave packet reduction, isanalyzed and is proved to be inconsistent withthe assumption that the theory governes alsothe measurement process. After these premises,the rest of the paper is devoted to discuss arecent proposal of overcoming the difficultiesof the standard formalism by acceptingnonlinear and stochastic modifications of thequantum dynamics. The proposed theory is shownto agree with all known predictions of thestandard theory concerning microscopic systemsand to account, on the basis of a universaldynamics which is assumed to govern allnatural processes, for wave packet reductionin measurement processes and, more important,to eliminate all the difficulties concerningmacroscopic situations. Actually, the proposedtheory allows one to take consistently amacrorealistic position about natural processes and about our definite perceptions. (shrink)

The number of independent messages a physical system can carry is limited by the number of its adjustable properties. In particular, systems with only one adjustable property cannot carry more than a single message at a time. We demonstrate that this is true for the photons in the double-slit experiment, and that this is what leads to the fundamental limit on measuring the complementary aspect of the photons. Next, we illustrate that systems with a single adjustable property exhibit other (...) class='Hi'>quantum behaviors, such as noncommutativity and no-cloning. Finally, we formulate a mathematical theory to describe the dynamics of such systems and derive the standard Hilbert space formalism of quantum mechanics as well as the Born probability rule. Our derivation demonstrates the physical foundation of quantum theory. (shrink)

In 1957, Feyerabend delivered a paper titled ‘On the Quantum-Theory of Measurement’ at the Colston Research Symposium in Bristol to sketch a completion of von Neumann's measurement scheme without collapse, using only unitary quantum dynamics and well-motivated statistical assumptions about macroscopic quantum systems. Feyerabend's paper has been recognised as an early contribution to quantum measurement, anticipating certain aspects of decoherence. Our paper reassesses the physical and philosophical content of Feyerabend's contribution, detailing the technical steps as (...) well as its overall philosophical motivations and consequences. Summarising our results, Feyerabend interpreted collapse as a positivist assumption in quantum mechanics leading to a strict distinction between the uninterpreted formalism of unitary evolution in quantum mechanics and the classically interpreted observational language describing post-measurement outcomes. Thus Feyerabend took the no-collapse completion of the von Neumann measurement scheme to show the dispensability of the positivist assumption, leading the way to a realistic interpretation of quantum theory. We note, however, that there are substantial problems with his account of measurement that bring into question its viability as a legitimate foil to the orthodox view. We further argue that his dissatisfaction with the von Neumann measurement scheme is indicative of early views on theoretical pluralism. (shrink)

Bohm and Hiley suggest that a certain new type of active information plays a key objective role in quantum processes. This paper discusses the implications of this suggestion to our understanding of the relation between the mental and the physical aspects of reality.

The Scottish scholar James McCosh was a champion of the Free church, a successful and much-published philosophy professor at Belfast for 16 years, and an energetic and innovative President of Princeton University from 1868 to 1888. The Religious Aspect of Evolution was published in 1888, and this second edition from 1890 took account of A. R. Wallace's latest work, Darwinism. McCosh, who already in Ireland had developed a 'theory of the universe conditioned by Christian revelation' was one of (...) very few clergymen in America who defended evolutionary theory. He impressed upon his students that while there seemed to be great truth in Darwin's theory, the work of the coming age must be to separate that truth from the error springing up around it. This would enable scholars to follow and even embrace science while also retaining their faith in the Bible. (shrink)

Abstract: This paper assesses the Everettian approach to the measurement problem, especially the version of that approach advocated by Simon Saunders and David Wallace. I emphasise conceptual, indeed metaphysical, aspects rather than technical ones; but I include an introductory exposition of decoherence. In particular, I discuss whether---as these authors maintain---it is acceptable to have no precise definition of 'branch' (in the Everettian kind of sense). (A version of this paper will appear in a CTNS/Vatican Observatory volume on Quantum (...) class='Hi'>Theory and Divine Action, ed. Robert Russell et al.). (shrink)

It is with great delight that I have accepted the unexpected invitation to edit this two part special issue of Foundations of Chemistry dedicated to the philosophical aspects and implications of the quantum theory of atoms in molecules (QTAIM) (Bader 1990). This theory has been primarily the oeuvre of Richard F. W. Bader (1931–2012), one of his most significant (but not the only significant) contributions to chemistry. Bader’s contributions have been summarized in a tribute (Matta et al. (...) 2011) that appeared in a recent Festschrift of The Journal of Physical Chemistry A (2011). This special issue of Foundations is neither a duplication, a complement, or an afterthought to that Festchrift, nor is it intended as another tribute to this great scientist, as deserving as he may be, instead it serves an entirely different purpose. This issue is focused principally on the epistemology and ontology of the science of QTAIM. The sort of questions that are addressed in, or that should emerge from. (shrink)

SummaryThe history of quantum physics has been deeply conditioned by the change in scientific practice as a social activity during the past fifty years. As a result the theory has not been allowed full maturing; both its formal and empirical advances have not resulted in a comparable conceptual progress. The recasting of quantum theory thus appears as an epistemological necessity. One of the main aspects of this process is to clear quantum theory from its (...) persisting classical connections in order to endow it with an autonomous and intrinsic status. Problems related to the foundations, description, interpretation and approximations of quantum theory are considered in turn, and various recent works are reviewed which contribute to the proposed endeavour.RésuméL'histoire de la théorie quantique a été fortement conditionnée par les changements intervenus au cours des cinquante dernières années dans la pratique scientifique en tant qu'activité sociale. La théorie en conséquence n'a pu atteindre sa pleine maturité et ses développements à la fois formels et empiriques n'ont pas conduit à des progrès conceptuels comparables. La refonte de la théorie quantique apparaît ainsi comme une nécessitéépistémologique. L'un des principaux aspects de ce processus consiste à débarrasser la théorie quantique de ses persistantes attaches classiques, de façon à lui conférer un statut autonome et intrinsèque. On considère ici tour à tour les problèmes de fondements, de terminologie, d'interprétation et de limites, de la théorie quantique, tout en passant en revue divers travaux récents contribuant à l'entreprise proposée.ZusammenfassungDie Geschichte der Quantenphysik ist in entscheidender Weise durch die Veränderungen, die in den letzten fünfzig Jahren in der wissenschaftlichen Praxis als einer sozialen Tätigkeit eingetreten sind, bestimmt worden. Die Theorie hat deshalb ihre volle Reife nicht erlangen können; ihre zugleich formalen und empirischen Entfaltungen haben nicht zu einem entsprechenden begrifflichen Fortschritt geführt. Eine Umgestaltung der Quantentheorie muss daher als ein erkenntnistheoretisches Desiderat betrachtet werden. Einer der wichtigsten Aspekte eines derartigen Unterfangens wird darin bestehen, die Theorie von ihren hartnäckigen Bindungen an klassische Begriffe zu befreien, um ihr einen eigenständigen und autonomen Status zu verleihen. Es werden die Probleme der Begründung, der Terminologie, der Interpretation und der Grenzen der Quantentheorie diskutiert, indem auch verschiedene kürzlich erschienene Arbeiten, die sich auf das vorgeschlagene Unternehmen beziehen, berücksichtigt werden. (shrink)

Weak Quantum Theory (WQT) and the Model of Pragmatic Information (MPI) are two psychophysical concepts developed on the basis of quantum physics. The present study contributes to their empirical examination. The issue of the study is whether WQT and MPI can not only explain ‘psi’-phenomena theoretically but also prove to be consistent with the empirical phenomenology of extrasensory perception (ESP). From the main statements of both models, 33 deductions for psychic readings are derived. Psychic readings are defined (...) as settings, in which psychics support or counsel clients by using information not mediated through the five senses. A qualitative approach is chosen to explore how the psychics experience extrasensory perceptions. Eight psychics are interviewed with a half-structured method. The reports are examined regarding deductive and inductive aspects, using a multi-level structured content analysis. The vast majority of deductions is clearly confirmed by the reports. Even though the study has to be seen as an explorative attempt with many aspects to be specified, WQT and MPI prove to be coherent and helpful concepts to explain ESP in psychic readings. (shrink)

Quantum probability is used to provide a new organization of basic quantum theory in a logical, axiomatic way. The principal thesis is that there is one fundamental time evolution equation in quantum theory, and this is given by a new version of Born’s Rule, which now includes both consecutive and conditional probability as it must, since science is based on correlations. A major modification of one of the standard axioms of quantum theory allows (...) the implementation of various mathematically distinct models (commonly called ‘pictures’) of them. A natural definition of isomorphism of models is presented next. For a given Hamiltonian the standard ‘pictures’ of quantum theory (e.g., Schrödinger, Heisenberg, interaction) are isomorphic models, whose probabilities are nonetheless model independent. The Schrödinger equation remains valid in one model of the axioms, even though it is no longer the fundamental equation of time evolution. All the usual calculations of standard, textbook quantum theory remain valid, but they are put in a new light. For example, the ‘collapse’ of the state is now viewed in the Schrödinger model as _one_ step in a _two_ step algorithm for calculating _one_ conditional probability. In the isomorphic Heisenberg model, where states are constant in time, one has the same conditional probability given by the same formula. Also, entanglement is defined in a new, more general model independent way as an aspect of quantum probability without using ‘collapse’ or tensor products. (shrink)

We put forward a possible new interpretation and explanatory framework for quantum theory. The basic hypothesis underlying this new framework is that quantum particles are conceptual entities. More concretely, we propose that quantum particles interact with ordinary matter, nuclei, atoms, molecules, macroscopic material entities, measuring apparatuses, in a similar way to how human concepts interact with memory structures, human minds or artificial memories. We analyze the most characteristic aspects of quantum theory, i.e. entanglement and (...) non-locality, interference and superposition, identity and individuality in the light of this new interpretation, and we put forward a specific explanation and understanding of these aspects. The basic hypothesis of our framework gives rise in a natural way to a Heisenberg uncertainty principle which introduces an understanding of the general situation of ‘the one and the many’ in quantum physics. A specific view on macro and micro different from the common one follows from the basic hypothesis and leads to an analysis of Schrödinger’s Cat paradox and the measurement problem different from the existing ones. We reflect about the influence of this new quantum interpretation and explanatory framework on the global nature and evolutionary aspects of the world and human worldviews, and point out potential explanations for specific situations, such as the generation problem in particle physics, the confinement of quarks and the existence of dark matter. (shrink)

Originally published in 1963, The Concept of the Positron forms a detailed analysis of quantum theory. Whilst it is not as well known as Professor Hanson's previous book, Patterns of Discovery, the text has many interesting aspects. In many ways it goes further than Hanson's earlier work in approaching the problems of theory competition and the rationality of science, topics that have since become central to the philosophy of science. It is also notable for a rigorous and (...) forthright defence of the Copenhagen Interpretation. Taken together, the ideas presented in this book constitute a first-rate achievement in the history and philosophy of science. This paperback reissue comes with a new preface from Matthew Lund, Assistant Professor, Faculty of Philosophy and Religious Studies at Rowan University. (shrink)

Authored by an acclaimed teacher of quantum physics and philosophy, this textbook pays special attention to the aspects that many courses sweep under the carpet. Traditional courses in quantum mechanics teach students how to use the quantum formalism to make calculations. But even the best students - indeed, especially the best students - emerge rather confused about what, exactly, the theory says is going on, physically, in microscopic systems. This supplementary textbook is designed to help such (...) students understand that they are not alone in their confusions (luminaries such as Albert Einstein, Erwin Schroedinger, and John Stewart Bell having shared them), to sharpen their understanding of the most important difficulties associated with interpreting quantum theory in a realistic manner, and to introduce them to the most promising attempts to formulate the theory in a way that is physically clear and coherent. The text is accessible to students with at least one semester of prior exposure to quantum (or "modern") physics and includes over a hundred engaging end-of-chapter "Projects" that make the book suitable for either a traditional classroom or for self-study. (shrink)

Quantum field theory provides the framework for many fundamental theories in modern physics, and over the last few years there has been growing interest in its historical and philosophical foundations. This anthology on the foundations of QFT brings together 15 essays by well-known researchers in physics, the philosophy of physics, and analytic philosophy.Many of these essays were first presented as papers at the conference?Ontological Aspects of Quantum Field Theory?, held at the Zentrum fr interdisziplin„re Forschung, Bielefeld, (...) Germany. The essays contain cutting-edge work on ontological aspects of QFT, including: the role of measurement and experimental evidence, corpuscular versus field-theoretic interpretations of QFT, the interpretation of gauge symmetry, and localization.This book is ideally suited to anyone with an interest in the foundations of quantum physics, including physicists, philosophers and historians of physics, as well as general readers interested in philosophy or science. (shrink)

After a brief survey of arguments for a unitary particle theory of matter, offered by the writer in previous publications, the following new items are discussed. (1) The wave part of the dual aspect of matter, resting on the translation formula λ=h/p, is not covariant in the nonrelativistic domain. And relativistically, it is untenable not only on methodological grounds, but because it leads to obvious contradictions to elementary experience, e.g., in the equilibrium between a material oscillator and radiation. (2) (...) The photon story as usually presented is rectified historically and factually. (3) The previous derivation by the writer of quantum mechanical theory from a nonquantal background is supplemented, in order to be conclusive, by the postulate that the general probability relation is to become the ordinary addition law in the average. (4) Quotations from the writings of prominant dualists, intended by the latter to support their ideology, disclose a fantastic disarray of pseudophilosophical standpoints which can be cleared up only by repudiating the alleged dual nature of matter and of light and by ceasing to constantly mix up the contrast between particles and fields with that between particles and waves, and by returning to a strictly unitary aspect. (shrink)

On several levels, there is now a debate whether the concept of God can be made compatible with modern science. In an attempt to elucidate this debate, I give an account of my own experiences from writing a book on the foundation of quantum mechanics. In my opinion, one can give two independent arguments for the existence of God by taking as departure an epistemic (knowledge-based) interpretation of quantum theory. However, I also argue that any religious (...) belief should be the result of an existential choice governed by each person’s own context (history and culture). In particular, I give my account of Christianity as a religion connected to our western culture, how one as a scientist can relate to the relevant dogmas. (shrink)

This NATO Advanced Study Institute centered on large-scale molecular systems: Quantum mechanics, although providing a general framework for the description of matter, is not easily applicable to many concrete systems of interest; classical statistical methods, on the other hand, allow only a partial picture of the behaviour of large systems. The aim of the ASI was to present both aspects of the subject matter and to foster interaction between the scientists working in these important areas of theoretical physics and (...) theoretical chemistry. The quantum-mechanical part was mostly based on the operator-algebraic formulation of quantum mechanics and comprised quantum statistics of infinite systems with special em phasis on macroscopic observables, equilibrium conditions, irreversibility on the one hand, symmetry breaking for molecules in the radiation field and macroscopic quantum phenomena in the theory of superconductivity (BCS-theory) on the other hand. In addition, phase-space methods for many-body systems were also presented. Statistical physics was the main topic in the other lectures of the School; much emphasis was put on the statistical features of macros copic ("large") systems, the lectures dealt with mass and energy transport im polymers, in gels and in microemulsions, with aggregation and growth phenomena, with relaxation in complex, correlated systems, with conduction and optical properties of polymers, and with the means of describing disordered systems, above all fractals and related hierarchical models. (shrink)

A geometro-differential quantum theory of extended particles is presented. The geometrical selling is that of Hilbert fiber bundles whose base manifolds are pseudo-Riemannian space-times of points χ which are interpreted as partial aspects of physical reality (the extended particle). The fibers are carrier spaces of induced (internal configuration and momentum) representations of the structural group (the de Sitter group here). Sections of these bundles are seen as physical representations of the particle, and their values in the fibers are (...) interpreted as states of internally localized modes composing the particle. This geometrical structure is “analogous” to that of a geometro-stochastic quantization developed in recent years. The physical interpretation is a combination of those of an old functional quantum theory and of an induced representation scheme based on an interpretation of intertwining, between configuration and momentum representations, as localization, materialization, and propagation of particles. Our model is applied in two cases: (1) Induced representation is applied in both space-time and internal space: both have de Sitter symmetry whose connection is ignored. Intertwining is considered in both spaces in a composed fashion. (2) For generic spacetimes and when the connection is taken into account, intertwining is applied only in the internal space. Parallel transport is combined with intertwining for a redefinition of localization, materialization, and propagation (the latter in a path integral context inspired from geometro-stochastic quantization). (shrink)

I summarize here the recent scientific achievements exploring the causal chain of solar activity. Following the causal chain has led to a novel comprehensive picture, including system-level regulation of local processes, such as the mass fiows in the solar interior I call attention to some crucial aspects of solar activity and present a series of facts that demand a revision of the old picture, according to which the Sun is a mere "hot ball of gas." For example, the magnetic changes (...) of solar activity are accelerated more than a billion times faster in comparison to theoretical expectations. The closer aspects of the comprehensive picture show that the mass fiows accelerating magnetic changes deviate significantly from their physically prescribed behavior corresponding to the given physical conditions of the solar interior. I argue that they must be orchestrated in a highly sophisticated manner. Another novel aspect that has been found is that the dynamo process is not enough to give an account of the magnetic cycle, since a regulative factor is needed to make the dynamo a machine. I show that the existence of a machine within the Sun introduces novel conceptual issues transcending the conceptualframework of physics. The novel problems have guided my search for the ultimate causes of solar activity toward biology. I present arguments showing the difference between the thermodynamic behavior of far-from-equilibrium open systems and the non-physical behavior of solar activity initiated by biological causes determining and organizing quantum uncertainties. Remarkably, the results fit adequately with the Whiteheadean view of organizational duality and show that the Sun can be regarded as a compound individual. (shrink)

According to a regnant criterion of physical equivalence for quantum theories, a quantum field theory (QFT) typically admits continuously many physically inequivalent realizations. This, the second of a two-part introduction to topics in the philosophy of QFT, continues the investigation of this alarming circumstance. It begins with a brief catalog of quantum field theoretic examples of this non-uniqueness, then presents the basics of the algebraic approach to quantum theories, which discloses a structure common even to (...) ‘physically inequivalent’ realizations of a QFT. Finally, it introduces and evaluates a handful of strategies for interpreting quantum theories in the face of the non-uniqueness of their Hilbert space representations. (shrink)

This is the first of a two-part introduction to some interpretive questions that arise in connection with quantum field theories (QFTs). Some of these questions are continuous with those familiar from the discussion of ordinary non-relativistic quantum mechanics (QM). For example, questions about locality can be rigorously posed and fruitfully pursued within the framework of QFT. A stark disanalogy between QFTs and ordinary QM – the former, but not the latter, typically admit infinitely many putatively physically inequivalent realizations (...) – prompts relatively novel questions, questions about how to understand and adjudicate different strategies for equipping quantum theories with content. Part I sketches the fate of locality and related notions in QFT, then documents the non-uniqueness unprecedented in ordinary QM but rampant in QFT. Part II presents foundations issues raised by non-uniqueness. (shrink)

The number of independent messages a physical system can carry is limited by the number of its adjustable properties. In particular, systems that have only one adjustable property cannot carry more than a single message at a time. We demonstrate this is the case for the single photons in the double-slit experiment, and the root of the fundamental limit on measuring the complementary aspect of the photons. Next, we analyze the other ‘quantal’ behavior of the systems with a single adjustable (...) property, such as noncommutativity and no-cloning. Finally, we formulate a mathematical theory to describe the dynamics of such systems and derive the standard Hilbert-space formalism of quantum mechanics. Our derivation demonstrates the physical foundation of the quantum theory. (shrink)

Despite its long history and stunning experimental successes, the mathematical foundation of perturbative quantum field theory is still a subject of ongoing research. This book aims at presenting some of the most recent advances in the field, and at reflecting the diversity of approaches and tools invented and currently employed. Both leading experts and comparative newcomers to the field present their latest findings, helping readers to gain a better understanding of not only quantum but also classical field (...) theories. Though the book offers a valuable resource for mathematicians and physicists alike, the focus is more on mathematical developments. This volume consists of four parts: The first Part covers local aspects of perturbative quantum field theory, with an emphasis on the axiomatization of the algebra behind the operator product expansion. The second Part highlights Chern-Simons gauge theories, while the third examines (semi-)classical field theories. In closing, Part 4 addresses factorization homology and factorization algebras. (shrink)

In this paper I consider some logical and mathematical aspects of the discussion of the identity and individuality of quantum entities. I shall point out that for some aspects of the discussion, the logical basis cannot be put aside; on the contrary, it leads us to unavoidable conclusions which may have consequences in how we articulate certain concepts related to quantum theory. Behind the discussion, there is a general argument which suggests the possibility of a metaphysics of (...) non-individuals, based on a reasonable interpretation of quantum basic entities. I close the paper with a suggestion that consists in emphasizing that quanta should be referred to by the cardinalities of the collections to which they belong, for which an adequate mathematical framework seems to be possible. (shrink)

Quantum systems have a holistic structure, which implies that they cannot be divided into parts. In order tocreate (sub)objects like individual substances, molecules, nuclei, etc., in a universal whole, the Einstein-Podolsky-Rosen correlations between all the subentities, e.g. all the molecules in a substance, must be suppressed by perceptual and mental processes.Here the particular problems ofGestalt (shape)perception are compared with the attempts toattribute a shape to a quantum mechanical system like a molecule. Gestalt perception and quantum mechanics turn (...) out (on an informal level) to show similar features and problems: holistic aspects, creation of objects, dressing procedures, influence of the observer, classical quantities and structures. The attribute classical of a property or structure means thatholistic correlations to any other quantity do not exist or that these correlations are considered as irrelevant and therefore eliminated (either deliberately and by declaration or in a mental process that is not under rational control). An example of animposed classical structure is the nuclear frame of a molecule. Candidates for classical properties that arenot imposed by the observer could be the charge of a particle or the handedness of a molecule. It is argued here that at least part of a molecule's shape can begenerated automatically by the environment. A molecular shape of this sort arises in addition to Lamb shift-type energy corrections. (shrink)

Theories of free fields describing spin zero and1/2 extended particles are derived within the stochastic quantum field theory (SQFT) framework. Covariant SQFT analogs of free Schwinger functions and Feynman propagators are obtained, and explicit expressions for charge and four-momentum operators are derived which exhibit a remarkable formal resemblance to their local counterparts. It is shown that the essential results of the LSZ formalism for interacting fields also have their counterpart in SQFT, and that the same holds true of (...) Wightman's reconstruction theorem. Fields on quantum space-time do not obey the local (anti)-commutativity postulate, but we argue that due to the uncertainty principle this postulate cannot be operationally justified as an expression of microcausality despite the customary identification of the two notions. An operationally consistent microcausality condition is proposed instead. (shrink)

Originally published in 1963, The Concept of the Positron forms a detailed analysis of quantum theory. Whilst it is not as well known as Professor Hanson's previous book, Patterns of Discovery, the text has many interesting aspects. In many ways it goes further than Hanson's earlier work in approaching the problems of theory competition and the rationality of science, topics that have since become central to the philosophy of science. It is also notable for a rigorous and (...) forthright defence of the Copenhagen Interpretation. Taken together, the ideas presented in this book constitute a first-rate achievement in the history and philosophy of science. This paperback reissue comes with a new preface from Matthew Lund, Assistant Professor, Faculty of Philosophy and Religious Studies at Rowan University. (shrink)

My purpose in this essay is to provide a critical survey of arguments within recent analytic philosophy regarding the so-called “mind-body problem” with a particular view toward the relationship between these arguments and the philosophy of A.N. Whitehead (and Charles Hartshorne’s closely related views).1In course, I shall argue that Whitehead’s panexperientialist physicalism avoids paradoxes and difficulties of both materialist-physicalism and Cartesian dualismas advocated by a variety of analytic philosophers. However, and I believe that this point is not often sufficiently recognized, (...) analytic philosophy of mind is no monolith, and there are those who have found some form of panexperientialism to be attractive enough to merit serious consideration or even full-fledgedacceptance (David Chalmers, Thomas Nagel, Ralph Pred, William Seager, and Galen Strawson among them). A critical discussion of such thinkers should beincluded in any adequate survey of the relation between process panexperientialism and the analytic tradition. Moreover, the revisionary strain of the analyticaltradition which looks to natural science for its construction of worldviews (Broad, Russell, Bunge, Carnap, Quine, etc.) would move us in the direction of examining arguments concerning Whitehead’s view and contemporary empirical scientific considerations. (For a discussion of the basic nature of analytic philosophy and the descriptive and revisionary approaches contained within it, see my Process and Analysis, 5-9, 12-13, 57; and McHenry.) Here I shall argue that Whiteheadian panexperientialism very naturally accommodates important aspects of quantum theory, including the top-down causation involved in neuroplastic phenomena under a quantum mechanical interpretation of brain processes and in so-called Quantum Zeno Effect. The overall picture which emerges is that Whitehead’s position is (at the very least) a strongly plausible alternative in philosophy of mind.While I must confess that this essay can only represent the merest sketch—indeed an adequate treatment of the richly complex interpretive, comparative, and substantive philosophical issues here requires at the very least a monograph—I nonetheless hope to present a coherent and useful précis of major arguments and comparative conceptual relationships, especially for the reader who may not be readily familiar with this terrain. I thus hope that this essay will serve as a short expository and critical introduction to the interface between process and analytic philosophy of mind, and a presentation of the several theoretical advantages gained by listening to Whitehead’s theory as it connects with concerns of analytic philosophers.I shall proceed by first working though the main outlines of John Searle’s important and widely reaching “The Recent History of Materialism,” an essay which exposes critical flaws in a variety of materialist theories in ways which Whiteheadians should find especially fitting and congenial. I shall then examine defenses of dualism and the relation of Whitehead to such defenses, followed by a separate section on Chalmers, Nagel, and Pred. I will then consider a number ofimportant objections to process panexperientialism, including objections arising from the work of Jaegwon Kim and John Searle. I close with a discussion of thementioned empirical scientific arguments. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:194 BOOK REVIEWS detailed discussion. Successive chapters examine Schleiermacher's theory of religious experience, two conceptions of interpretation, the ascription of emotion to oneself and others, mysticism, religious experience as such, and different kinds of explanation of religious experience and the issue of reductionism. The book as a whole seems to me rather an impressive treatment of a very important subject. University of Calgary Calgary, Alberta (...) HUGO A. MAYNELL Intimations of Reality: Critical Realism in Science and Religion. By ARTHUR PEACOCKE. Notre Dame, Indiana: University of Notre Dame Press, 1984. Pp. 94. $10.95(cl.), $4.95(pa.). In the first of the two lectures printed in this small volume, Peacocke argues for a " critical realist " interpretation of both scientific theories and religious doctrines. Both aim (fallibly but genuinely) to speak of reality, and their methods and tools are similar enough so that if the claims of one deserve to be taken seriously, so do those of the other. Addressing one reality as they do, science and theology cannot proceed in isolation, but must he regarded as "interacting and mutually illumiminating " (51). In the second lecture Peacocke offers suggestions as to how theologians should construe the relation between God and the created world, in view of what scientists are now telling us about the latter. Many of the ideas presented here are familiar from Peacocke's earlier Creation and the World of Science and from writings of Ian Barbour and others. The main novelty lies in his buttressing the case for (and refining the interpretation of) critical realism with arguments drawn from recent work in the philosophy of science. I will start with his discussion of critical realism with respect to science, and then consider his claims for theology, his argument for the mutual relevance of the two, and (briefly) his theological suggestions. · As Peacocke sees the history of the subject, an earller-prevalent "naive realism " about scientific theories and the entities mentioned in them has been undermined chiefly by the work of T. S. Kuhn et al., especially as extended and radicalized by sociologists of science-most pointedly by those pursuing the " strong programme " of explaining scientific theories past and present as social products, without regard to any assessment of their truth value and thus without invoking conformity to reality in explaining a theory's acceptance or success. The recent revival BOOK REVIEWS 195 of realism among philosophers of science he views largely in the aspect of a rebuttal of the sociologists' anti-realist claims. He notes, but sets aside as ancillary to his project, the question what we might learn from the strong-programmers even if we deny their more radical claims. Fair enough. What is more regrettable is that the unwary reader could easily come away with the impression that contemporary philosophers of science are to be found in just two camps on these matters: realists and sociologically-minded anti-realists. In fa.ct, there have been and are quite a few--e.g. Bas van Fraasen and Larry Laudan-who argue against realism on grounds quite independent of sociology : Duhemian grounds, for instance, and considerations drawn from quantum theory. (See van Frassen's The Scientific Image, Laudan's Science and Values, and their respective essay:;; in Scientific Realism, edited by Jarrett Leplin.) So, while there is a revival of realism in philosophy of science, there is hardly a consensus, though it is no doubt also true that most working scientists, unaffected by the philosophers' debate, would adopt some form of critical realism. But how, specifically, does critical realism differ from the naive kind' The difficulty of answering this question is compounded by the great variety of theses held by various authors to be central claims of realism (or anti-realism) simpliciter. This variety is well illustrated in Leplin's collection, and anatomized in his introduction to it. One of the authors on whom Peacocke draws, Ian Ha.eking, distinguishes, in his contribution to the Leplin volume and at greater length in his Representing and Intervening, between realism about entities (theoretical terms, or many of them, do refer; there are such things as electrons) and realism about theories (scientific theories, even large-scale ones like the fundamental... (shrink)

To solve the probability problem of the Many Worlds Interpretation of Quantum Mechanics, D. Wallace has presented a formal proof of the Born rule via decision theory, as proposed by D. Deutsch. The idea is to get subjective probabilities from rational decisions related to quantum measurements, showing the non-probabilistic parts of the quantum formalism, plus some rational constraints, ensure the squared modulus of quantum amplitudes play the role of such probabilities. We provide a new presentation (...) of Wallace’s proof, reorganized to simplify some arguments, and analyze it from a formal perspective. Similarities with classical decision theory are made explicit, to clarify its structure and main ideas. A simpler notation is used, and details are filled in, making it easier to follow and verify. Some problems have been identified, and we suggest possible corrections. (shrink)

The paper, in Part 1, is devoted to discussing the underlying logic and algebra of the classical mechanics and quantum mechanics, their syntax and semantics, the reasons for their differences and the diagrammatic representations of the two. This part of the paper also demonstrates that there are several puzzling characters of microphysical phenomena by alluding to the relevant details of the double-slit experiment. These counterintuitive results of the experiment make it difficult to explain the empirical success and realist commitments (...) of quantum mechanics. The second part, Part 2, of the paper is concerned with the question as to how conceptual schemes of scientists interact with the world such that the problem of new meaning and reference of the microphysical terms could be determined. The paper refrains from having a general discussion on Realism and do not venture into a comprehensive survey and critique of all known varieties of realistic interpretations. It selects only a few forms of realism (based on the reasons given) in investigating microphysical phenomena forming part of QM. These selected forms of realism explain how does conceptual scheme/terms in scientific theory hookup to the objects and their relations in the world based on the model-theoretic character of the scientific theory and causal rigidified descriptivism of scientific terms (vide Putnam) as well as scientist’s interaction with the world, say, in the “instrumental context of laboratory” (vide Heelan) such that the problem of meaning and reference could be resolved. The paper claims that convergence of the two views may result in a particular form of realism, the Hermeneuticized Internal Realism, appropriate for the science of microphysical phenomena. (shrink)

The ambition of this book is a noble one: to provide a counter to the assumption, taken for granted made by many postmodernists, that quantum mechanics lends support to the view that scienti® c realism is nothing more than an outmoded fad. It is especially gratifying that this book comes from a literary theorist, author of a well-respected book on Derrida (Norris, 1987), who, by his own admission, has ª previously published several books on literary theory that might (...) be construed ¼ as going along with the emergent trend towards anti-realism and cultural relativism in various quarters of `advanced’ theoretical debateº (Introduction, p. 1). One wishes, however, that Norris had taken more time to familiarize himself with issues that he writes about, and that he had taken more care in constructing his arguments. Although ª there will be more joy in heaven over one sinner who repents than over ninety-nine righteous persons who need no repentanceº (Luke 15: 7, RSV), we should not let jubilation blind us to the book’ s shortcomings. Among these is a lack of clarity in its central notion, that of realism. Early on, Norris quotes with approval William Alston’ s characterization of the alethic conception of realism, which is the conception advocated by Norris; the alethic conception ª implies that (almost always) what confers a truth-value on a statement is something independent of the cognitive-linguistic goings-on that issued in that statement, including any epistemic status of those goings-onº (p. 41). As the book progresses, however, additional conditions on what is to count as a realist interpretation of quantum mechanics emerge. Realism apparently becomes synonymous with ª causal-explanatoryº theories, and in one passage, Norris goes so far as to suggest that realism entails a commitment to synthetic a priori knowledge of the physical world: Bell’ s calculations and those applied in interpreting the Aspect results are themselves dependentÐ no less than EPRÐ on a range of distinctly ª classicalº assumptions, among them the existence of a physical object-domain which, however puzzling its details, permits such experiments to be carried out and conclusions to be drawn from them.. (shrink)

Quantum mechanics unites epistemology and ontology: it brings human knowledge explicitly into physical theory, and ties this knowledge into brain dynamics in a causally efficacious way. This development in science provides the basis for a natural resolution of the dualist functionalist controversy, which arises within the classical approach to the mind brain system from the fact that the phenomenal aspects are not derivable from the principles of classical mechanics. A conceptually simple causal quantum mechanical theory of (...) the mind/brain is described, and used to examine the necessity and function of consciousness in brain process. (shrink)

I shall describe the beautiful fit of the ideas of Alfred North Whitehead and William James with the concepts of relativistic quantum field theory developed by Tomonaga and Schwinger.The central concept is a set of happenings each of which is assigned a space-time region.This growing set of non-overlapping regions fill out a growing space-time region that advances into the still uncreated and yet-to-be-axed future.Each happening has both experiential aspects and physical aspects,which are jointly needed to generate the advance (...) into the future.This conception is useful in passing from the pragmatic interpretation of science to a putative understanding of the reality beyond phenomena,and of our role within it. James' ideas about attention and volition are naturally implementable within this framework,and make us into agents that can act eficaciously upon the physical world on the basis of felt values, rational reasons,and conscious understandings. (shrink)

This paper gives a technically elementary treatment of some aspects of Hamilton -Jacobi theory, especially in relation to the calculus of variations. The second half of the paper describes the application to geometric optics, the optico-mechanical analogy and the transition to quantum mechanics. Finally, I report recent work of Holland providing a Hamiltonian formulation of the pilot-wave theory.

Recent developments in quantum theory have focused attention on fundamental questions, in particular on whether it might be necessary to modify quantum mechanics to reconcile quantum gravity and general relativity. This book is based on a conference held in Oxford in the spring of 1984 to discuss quantum gravity. It brings together contributors who examine different aspects of the problem, including the experimental support for quantum mechanics, its strange and apparently paradoxical features, its underlying (...) philosophy, and possible modifications to the theory. (shrink)

The various schools of the Indian classical philosophy have discussed the issue how we understand the meaning from an utterance. In the present paper, I analyse the ancient controversy on this issue between two schools, Naiyāyikas and Vaiśeṣikas, and attempt to show that it has two aspects of religious and epistemological natures. Vaiśeṣikas, on the ground that the process of the verbal understanding is identical with that of the inference, claim that the verbal understanding is merely a type of (...) the inference. Naiyāyikas oppose this and assert that the former is distinct from the latter. I summarise Vaiśeṣikas’ argument into two points: (1) the similarity of the objects of the cognition and (2) that of the relations between the object and what denotes it. Naiyāyikas rejects both thesimilarities. The above discussion, which may stimulate our epistemological interest, has a close connection with the issue of scriptures. The utterance as a source of knowledge seems to have stood, in the early period, only for the scriptures, as pointed out by Hiryanna. Taking this into consideration, Vaiśeṣikas’ thesis can be understood to imply that they deny the intrinsic authority of scriptures and reduce it to the rational faculty of human beings. Naiyāyikas also deny itsintrinsic authority, but their view on the cognitive process of the verbal understanding is different from that of Vaiśeṣikas. The reason of this divergence may lie in how they treat the reliability of the speaker in respect to the cognitive process. (shrink)

This book comprises all of John Bell's published and unpublished papers in the field of quantum mechanics, including two papers that appeared after the first edition was published. It also contains a preface written for the first edition, and an introduction by Alain Aspect that puts into context Bell's great contribution to the quantum philosophy debate. One of the leading expositors and interpreters of modern quantum theory, John Bell played a major role in the development of (...) our current understanding of the profound nature of quantum concepts. First edition Hb (1987): 0-521-33495-0 First edition Pb (1988): 0-521-36869-3. (shrink)

Quantum Field Theory (QFT) is the mathematical and conceptual framework for contemporary elementary particle physics. In a rather informal sense QFT is the extension of quantum mechanics (QM), dealing with particles, over to fields, i.e. systems with an infinite number of degrees of freedom. (See the entry on quantum mechanics.) In the last few years QFT has become a more widely discussed topic in philosophy of science, with questions ranging from methodology and semantics to ontology. QFT (...) taken seriously in its metaphysical implications seems to give a picture of the world which is at variance with central classical conceptions of particles and fields, and even with some features of QM. -/- The following sketches how QFT describes fundamental physics and what the status of QFT is among other theories of physics. Since there is a strong emphasis on those aspects of the theory that are particularly important for interpretive inquiries, it does not replace an introduction to QFT as such. One main group of target readers are philosophers who want to get a first impression of some issues that may be of interest for their own work, another target group are physicists who are interested in a philosophical view upon QFT. (shrink)

This paper explores the theme “quantum approaches to consciousness” by considering the work of one of the pioneers in the field. The physicist David Bohm not only made important contributions to quantum physics, but also had a long-term interest in interpreting the results of quantum physics and relativity in order to develop a general world view. His idea was further that living and mental processes could be understood in a new, scientifically and philosophically more coherent way in (...) the context of such a new world view. This paper gives a brief overview of different – and sometimes contradictory - aspects of Bohm’s research programme, and evaluates how they can be used to give an account of topics of interest in contemporary consciousness studies, such as analogies between thought and quantum processes, the problem of mental causation, the mind-body problem and the problem of time consciousness. (shrink)