An alternative model for tunneling processes, based on the capability of the telegrapher's equation to describe stochastic processes, is able to account for delay time results of an optical experiment at the microwave scale, where superluminal behaviors have been evidenced.

Experiments with evanescent modes and tunneling particles have shown that (i) their signal velocity may be faster than light, (ii) they are described by virtual particles, (iii) they are nonlocal and act at a distance, (iv) experimental tunneling data of phonons, photons, and electrons display a universal scattering time at the tunneling barrier front, and (v) the properties of evanescent, i.e. tunneling modes are not compatible with the special theory of relativity.

We make a brief review of the Kramers escape rate theory for the probabilistic motion of a particle in a potential well U(x), and under the influence of classical fluctuation forces. The Kramers theory is extended in order to take into account the action of the thermal and zero-point random electromagnetic fields on a charged particle. The result is physically relevant because we get a non-null escape rate over the potential barrier at low temperatures (T → 0). It is found (...) that, even if the mean energy is much smaller than the barrier height, the classical particle can escape from the potential well due to the action of the zero-point fluctuating fields. These stochastic effects can be used to give a classical interpretation to some quantum tunneling phenomena. Relevant experimental data are used to illustrate the theoretical results. (shrink)

In the Chinese stock market, controlling shareholders often use inter-corporate loans to expropriate a great amount of cash from listed firms, through a process called “tunneling.” Using a sample of 10,170 firm-year observations from the Chinese stock market for the period of 2001–2010, I examine whether and how Buddhism, China’s most influential religion, can mitigate tunneling. In particular, using firm-level Buddhism data, measured as the number of Buddhist monasteries within a certain radius around Chinese listed firms’ registered addresses, (...) this study provides strong evidence that Buddhism intensity is significantly negatively associated with tunneling. This finding is consistent with the view that Buddhism has important influence on corporate behavior and can serve as a set of social norms and/or an alternative mechanism to mitigate controlling shareholders’ unethical tunneling behavior. In addition, my findings also reveal that the negative association between Buddhism intensity and tunneling is attenuated for firms that have high analyst coverage. The results are robust to various measures of Buddhism intensity and a variety of sensitivity tests. (shrink)

We consider the time delay of massive, non-relativistic, one-dimensional particles due to a tunneling potential. In this setting the well-known Hartman effect asserts that often the sub-ensemble of particles going through the tunnel seems to cross the tunnel region instantaneously. An obstacle to the utilization of this effect for getting faster signals is the exponential damping by the tunnel, so there seems to be a trade-off between speedup and intensity. In this paper we prove that this trade-off is never (...) in favor of faster signals: the probability for a signal to reach its destination before some deadline is always reduced by the tunnel, for arbitrary incoming states, arbitrary positive and compactly supported tunnel potentials, and arbitrary detectors. More specifically, we show this for several different ways to define “the same incoming state” and “the same detector” when comparing the settings with and without tunnel potential. The arrival time measurements are expressed in the time-covariant approach, but we also allow the detection to be a localization measurement at a later time. (shrink)

When Wittgenstein was young, he wrote a small book intended to solve all of philosophy’s problems with language, called Tractatus Logico-Philosophicus (1922). As an intellectual piece, the Tractatus is a strange beast, written by a student with the voice of a professor. Its process of creation resembles that of a fictional piece: the author is struck by inspiration, labours in solitude, and then translates the vision onto paper. Yet the Tractatus was not meant to be a work of fiction, rather (...) to have the final say in a conceptual debate about the relation between language and world. This little book was meant to be the end of all philosophical conversation, the final nail in its coffin. Written outside the university, the Tractatus had the ambition of ending the academic conversation in philosophy, while it refused to engage with that conversation. This was not fair-play on any account. The Tractatus was never intended to be an academic text; it had no footnotes, no references to other authors. It was a vision of language that Wittgenstein had shared with the world. (shrink)

Philosopher and scientist Thomas Metzinger argues that neuroscience's picture of the "self" as an emergent phenomenon of our biology and the attendant fact that the "self" can be manipulated--and even controlled--raises novel and serious ...

On of the earliest triumphs of quantum mechanics, when the theory was first formulated in the 1920s, was George Gamow's use of quantum tunneling to explain the phenomenon of alpha decay. It was well known then that certain heavy radioactive nuclei, including radium then widely used for glow-in-the-dark clock dials, would spontaneously and unpredictably spit out an energetic helium-4 nucleus (also called an alpha particle) and be transformed into a new lighter nucleus with two fewer nuclear charges. Alpha radioactivity (...) is often very improbable, and this takes the form of alpha-decay half-lives measured in thousands or even millions of years. The question was, how and why did the alpha particle escape its prison in the nucleus, where it should have been tightly and permanently bound? (shrink)

A simple model of a quantum clock is applied to the old and controversial problem of how long a particle takes to tunnel through a quantum barrier. The model has the advantage of yielding sensible results for energy eigenstates and does not require the use of time-dependent wave packets. Although the treatment does not forbid superluminal tunneling velocities, there is no implication of faster-than-light signaling because only the transit duration is measurable, not the absolute time of transit. A comparison (...) is given with the weak-measurement post-selection calculations of Steinberg. (shrink)

It is proposed in this paper that enzymes, by virtue of a number of correctly positioned sites of interaction with substrates, can force the compression of hydrogen bonds, increasing the probability of proton transfer by quantum mechanical tunneling. By such a catalytic mechanism a rate enhancement of many orders of magnitude may be obtained with a very low energy input requirement. The mechanism would, however, require a highly structured catalyst.Pertinent aspects of hydrogen bond theory and of tunneling theory (...) are briefly reviewed. (shrink)

Michael Riordan, Lillian Hoddeson and Adrienne W. Kolb, Tunnel Visions: The Rise and Fall of the Superconducting Super Collider (Chicago and London: The University of Chicago Press, 2015), xiii+448 pp.

The article analyzes an interactional form of tunnel vision or cognitive bias in a series of mundane police–suspect interactions. The data come from a murder case in which the suspect, later convicted and then released from prison with the help of the Wisconsin Innocence Project, frequently calls police detectives to inquire about his confiscated van. As he is operating in a context in which accusations are rarely made explicit, we highlight the suspect’s use of a complaint-denial device to tacitly claim (...) innocence. The police respond by focusing on the complaint rather than the denial part of the device. The use of the complaint-denial device is compared to more formal inquiries in which accusations are overt. We discuss the implications of a sociological understanding of cognitive bias – how it may operate in practices of talk and social interaction during informal encounters – for other criminal justice settings. (shrink)

Macromolecular protein complexes catalyze essential physiological processes that sustain life. Various interactions between protein subunits could increase the effective mass of certain peptide groups, thereby compartmentalizing protein α-helices. Here, we study the differential effects of applied massive barriers upon the soliton-assisted energy transport within proteins. We demonstrate that excentric barriers, localized onto a single spine in the protein α-helix, reflect or trap three-spine solitons as effectively as concentric barriers with comparable total mass. Furthermore, wider protein solitons, whose energy is lower, (...) require heavier massive barriers for soliton reflection or trapping. Regulation of energy transport, delivery and utilization at protein active sites could thus be achieved through control of the soliton width, or of the effective mass of the protein subunits. (shrink)

Ras homolog enriched in the striatum (Rhes) is a striatal enriched protein that promotes the formation of thin membranous tubes resembling tunneling nanotubes (TNT)—“Rhes tunnels”—that connect neighboring cell and transport cargoes: vesicles and proteins between the neuronal cells. Here the literature on TNT‐like structures is reviewed, and the implications of Rhes‐mediated TNT, the mechanisms of its formation, and its potential in novel cell‐to‐cell communication in regulating striatal biology and disease are emphasized. Thought‐provoking ideas regarding how Rhes‐mediated TNT, if it (...) exists, in vivo, would radically change the way neurons communicate in the brain are discussed. (shrink)

It is generally believed that Bohm's version of quantum mechanics is observationally equivalent to standard quantum mechanics. A more careful statement is that the two theories will always make the same predictions for any question or problem that is well posed in both interpretations. The transit time of a “particle” between two points in space is not necessarily well defined in standard quantum mechanics, whereas it is in Bohm's theory since there is always a particle following a definite trajectory. For (...) this reason tunneling times (in a scattering configuration through a potential barrier may be a situation in which Bohm's theory can make a definite prediction when standard quantum mechanics can make none at all. I summarize some of the theoretical and experimental prospects for an unambiguous comparison in the hope that this question will engage the attention of more physicists, especially those experimentalists who now routinely actually do gedanken experiments. (shrink)

"Shepard may be the best lesser-known film critic." —The New York Times Book Review The first book of nonfiction from one of our great fiction writers. Given that most Americans proudly consider themselves non-political, where do our notions of collective responsibility come from? Which self-deceptions, when considering ourselves as actors on the world stage, do we cling to most tenaciously? Why do we so stubbornly believe, for example, that our country always means well when intervening abroad? The Tunnel at the (...) End of the Light argues that some of our most persistent and destructive assumptions, in that regard, might come from the movies. In these ten essays Jim Shepard weaves close readings of film with cultural criticism to explore the ways in which movies work so ubiquitously to reflect how Americans think and act. Whether assessing the “high-spirited glee of American ruthlessness” captured in GoodFellas, or finding in Lawrence of Arabia a “portrait of the lunatic serenity of our leaders’ conviction in the face of all evidence and their own lack of knowledge,” he explores how we enter into conversations with specific genres and films—Chinatown, The Third Man, and Badlands among others—in order to construct and refine our most cherished illusions about ourselves. (shrink)

I propose to consider photon tunneling as a space-time correlation phenomenon between the emission and absorption of a photon on the two sides of a barrier. Standard technics based on an appropriate counting rate formula may then be applied to derive the tunneling time distribution without any ad hoc definition of this quantity. General formulae are worked out for a potential model using Wigner–Weisskopf method. For a homogeneous square barrier in the limit of zero tunneling probability a (...) vanishing tunneling time is obtained. (shrink)

In a previous paper it was shown that the tunnel effect does not occur in the motion of an undeformable wavelet which we obtained by solving the Schrödinger equation and interpreted as representing a single particle. In the present supplementary paper we solve the same Schrödinger equation while modifying one of the restrictive conditions assumed previously, and obtain wavelets which deform in force fields. Tunnel effects are seen in the motion of these deformable wavelets. An apparent inaccuracy pointed out mathematically (...) in these solutions is shown to be insignificant under conditions which are feasible in the physical sense. (shrink)

Motivated by Hoff and Stiglitz’s :753–763, 2004) theory, we examine empirically how the creation of “rules of the game” affect the behavior of economic agents in a transition economy. Using a sample of Chinese state-owned enterprises in which controlling ownership was transferred to private acquirers between 1994 and 2006, we find that the post-privatization performance of firms depends on institutional factors. Before 2003, we observe severe post-privatization tunneling behaviors by acquirers and worse PPP. However, from 2003, when the State (...) issued regulations against tunneling and strengthened enforcement, the incidence of tunneling behaviors declined, and PPP improved. We find that better implementation of ownership transfer and longer prior experience of private acquirers are key factors that contribute to the improvement. (shrink)

The ribosomal polypeptide tunnel exit is the site where a variety of factors interact with newly synthesized proteins to guide them through the early steps of their biogenesis. In mitochondrial ribosomes, this site has been considerably modified in the course of evolution. In contrast to all other translation systems, mitochondrial ribosomes are responsible for the synthesis of only a few hydrophobic membrane proteins that are essential subunits of the mitochondrial respiratory chain. Membrane insertion of these proteins occurs co‐translationally and is (...) connected to a sophisticated assembly process that not only includes the assembly of the different subunits but also the acquisition of redox co‐factors. Here, we describe how mitochondrial translation is organized in the context of respiratory chain assembly and speculate how alteration of the ribosomal tunnel exit might allow the establishment of a subset of specialized ribosomes that individually organize the early steps in the biogenesis of distinct mitochondrially‐encoded proteins. (shrink)

Philosophical Psychology, Volume 0, Issue 0, Page 1-5, Ahead of Print.

Myth & Symbol, Volume 6, Issue 2, Page 15-43, November 2010.

The story of Medea has exerted a powerful influence on creative artists since the time of Euripides. It is a tale that has been told in many ways and in several genres. This article offers a discussion of Christa Wolf's 1996 novel, Medea.Stimmen (Medea. Voices), a modern retelling through the voices, and conflicting perspectives, of the major characters involved with Medea, including Jason, Agameda, Akamas, Leukon, Glauce and Medea herself.Medea's role within feminist literary reception and women's literature cannot be overlooked (...) because of the crucial archetype she represents. One task of Feminist criticism has been to expose, deconstruct and rectify prevalent male (mis) interpretations of female archetypes, such as Medea, Medusa and others, and the patriarchal distortions they introduced through 3 000 years of male literature. In the patriarchal realm, Medea represents the Witch, the black Sorceress, and the archetype of the Negative Mother. These negative interpretations or archetypes may be attributed to misogynist perceptions of Medea as the vilest of women, because she committed the most despicable of all crimes — killing her children, the patriarchy's heirs — to take revenge on Jason, the husband who abandons her in Corinth (her place of exile) to marry Glauce, King Creon of Corinth's daughter, for reasons of political expedience.As a writer with her roots in the former East-German regime, Wolf perceives the Medea story as an account of a woman with both extraordinary powers and human shortcomings, who is misunderstood by the Colchians and the Corinthians alike. Wolf explores the distorted patriarchal motives for their loathing of Medea and Medea's ultimate powerlessness to do anything more than accept her tragic destiny. In doing so, Wolf does not attempt to manipulate the Medea story to suit the one-sidedness of some more radical feminist ideologies. (shrink)

This paper employs the ideas of geometric algebra to investigate the physical content of Dirac's electron theory. The basis is Hestenes' discovery of the geometric significance of the Dirac spinor, which now represents a Lorentz transformation in spacetime. This transformation specifies a definite velocity, which might be interpreted as that of a real electron. Taken literally, this velocity yields predictions of tunnelling times through potential barriers, and defines streamlines in spacetime that would correspond to electron paths. We also present a (...) general, first-order diffraction theory for electromagnetic and Dirac waves. We conclude with a critical appraisal of the Dirac theory. (shrink)

Molecular vibrations and quantum tunneling may link ligand binding to the function of pharmacological receptors. The well‐established lock‐and‐key model explains a ligand's binding and recognition by a receptor; however, a general mechanism by which receptors translate binding into activation, inactivation, or modulation remains elusive. The Vibration Theory of Olfaction was proposed in the 1930s to explain this subset of receptor‐mediated phenomena by correlating odorant molecular vibrations to smell, but a mechanism was lacking. In the 1990s, inelastic electron tunneling (...) was proposed as a plausible mechanism for translating molecular vibration to odorant physiology. More recently, studies of ligands’ vibrational spectra and the use of deuterated ligand analogs have provided helpful information to study this admittedly controversial hypothesis in metabotropic receptors other than olfactory receptors. In the present work, based in part on published experiments from our laboratory using planarians as an experimental organism, I will present a rationale and possible experimental approach for extending this idea to ligand‐gated ion channels. (shrink)

This paper investigates whether corporate philanthropic decisions are associated with a firm’s listing status and business group affiliation. Analyzing a large sample of public and private firms in Korea, we find that public firms make more charitable contributions than private firms and business group-affiliated firms make more charitable contributions than non-affiliated firms. The results suggest that public firms, owing to greater public scrutiny, and business groups, owing to higher political costs, are encouraged to make more corporate charitable contributions. Further, we (...) find that greater corporate giving by public firms than private firms is more pronounced for business group-affiliated firms, compared with non-affiliated firms. The result is consistent with business groups’ strategic coordination of their affiliates’ philanthropic decisions to tunnel business group resources out to controlling shareholders who hold a larger portion of private affiliates than public affiliates. (shrink)

Several years ago, in quantum mechanics, Davies proposed a method to calculate particle’s traveling time with the phase difference of wave function. The method is convenient for calculating the sojourn time inside a potential step and the tunneling time through a potential hill. We extend Davies’ non-relativistic calculation to relativistic quantum mechanics, with and without particle-antiparticle creation, using Klein–Gordon equation and Dirac Equation, for different forms of energy-momentum relation. The extension is successful only when the particle and antiparticle creation/annihilation (...) effect is negligible. (shrink)

This paper examines the association between corporate philanthropy and tunneling by controlling shareholders. Using a unique dataset from China, the paper finds evidence that firms donating more are less likely to tunnel. The negative association between philanthropy and tunneling is stronger when firms are faced with more severe agency conflicts, as indicated by lower largest shareholding, fewer growth opportunities, lower state ownership, and weaker product market competition. The results suggest that companies engaging in philanthropy have incentives to enhance (...) their reputations and improve their relationships with stakeholders. (shrink)

Tunneling oscillations induced in a double quantum well by a monochromatic electromagnetic wave incident perpendicularly to the plane of the well, and polarized along the direction of its growth, are treated. For the wave frequency in proximity to the energy difference between two states of opposite symmetry, a periodic energy exchange between the wave and a carrier which moves from one energy state to the other is established. When the carrier starts from the low energy level it borrows energy (...) from the wave until it reaches the higher energy state. On its way the carrier performs current oscillations that cease whenever it reaches an eigenstate. Similarly, oscillation is required during the carrier's motion from the high to the low energy state for the photon emission in order that the radiation gets back the energy already given to the carrier. Thus an accelerating charge not only radiates, but also absorbs wave energy. When there prevails a considerable population difference between the two levels the possibility of quantum beat exits. (shrink)

This essay marks the centenary of 1922, annus mirabilis of modernism but also the year when my grandparents became child refugees in the Asia Minor Catastrophe. In Mrs. Dalloway and her Diary, Virg...

Se exponen las prácticas docentes de las educadoras de párvulos, que cumplen una función reproductora del nacionalismo que es internalizado en las niñas y niños como la ciudadanía chilena. Para ello, configuran un escenario lúdico que ritualiza la conducta cívica y patriótica, por medio de conmemoraciones cívicas fundadas en el belicismo de la guerra del Pacífico, sin considerar la realidad cosmopolita y de diversidad cultural presente en las aulas nortinas. A partir de esto, proponemos una nueva perspectiva respecto de la (...) realización de actos cívicos en la educación parvularia, para hacerlos más inclusivos y acordes a la realidad cultural de la región de Tarapacá, la más multicultural de Chile. This paper describes the teaching practices of pre-school teachers who play a reproductive role of nationalism internalized in children as Chilean citizenships. This happens as the result of a ludic scenario that ritualizes civic and patriotic conduct, through civic commemorations based on the Pacific war, regardless both the cosmopolitan reality and cultural diversity present in classrooms in the Northern part of Chile. Considering this, we propose a new perspective on conducting civic events in early childhood education, to make them more inclusive and consistent with the cultural reality of the region of Tarapacá, Chile's most multicultural region. (shrink)