19 found
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  1. Einstein, Podolsky, Rosen, and Shannon.Asher Peres - 2005 - Foundations of Physics 35 (3):511-514.
    The Einstein–Podolsky–Rosen paradox (1935) is reexamined in the light of Shannon’s information theory (1984). The EPR argument did not take into account that the observer’s information was localized, like any other physical object.
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  2. All the Bell Inequalities.Asher Peres - 1999 - Foundations of Physics 29 (4):589-614.
    Bell inequalities are derived for any number of observers, any number of alternative setups for each one of them and any number of distinct outcomes for each experiment. It is shown that if a physical system consists of several distant subsystems, and if the results of tests performed on the latter are determined by local variables with objective values, then the joint probabilities for triggering any given set of distant detectors are convex combinations of a finite number of Boolean arrays, (...)
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  3.  85
    Karl Popper and the copenhagen interpretation.Asher Peres - 2002 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 33 (1):23-34.
    Popper conceived an experiment whose analysis led to a result that he deemed absurd. Popper wrote that his reasoning was based on the Copenhagen interpretation and therefore invalidated it. Many authors who have examined Popper's analysis have found in it various technical flaws which are briefly summarized here. However, the aim of the present article is not technical. My concern is to redress logical flaws in Popper's argument: the terminology he uses is ambiguous, his analysis involves counterfactual hypotheses, and it (...)
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  4.  27
    Karl Popper and the Copenhagen interpretation.Asher Peres - 2002 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 33 (1):23-34.
  5. The classic paradoxes of quantum theory.Asher Peres - 1984 - Foundations of Physics 14 (11):1131-1145.
    This paper contains four new dialogues among Simplicio, Salviati, and Sagredo, on the fate of Schrödinger's cat, the existence of physical quantities, the paradigm of Einstein, Podolsky, and Rosen, and why a watched kettle may boil, after all.
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  6.  90
    Einstein, Gödel, Bohr.Asher Peres - 1985 - Foundations of Physics 15 (2):201-205.
    Linear combinations of “elements of reality,” as defined by Einstein, Podolsky, and Rosen, may not be themselves “elements of reality.” There are questions which can be formulated (and unambiguously answered) in the ordinary language of experimental physics, but cannot be represented in the mathematical framework of quantum theory in a nontrivial way.
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  7. Existence of “free will” as a problem of physics.Asher Peres - 1986 - Foundations of Physics 16 (6):573-584.
    The proof of Bell's inequality is based on the assumption that distant observers can freely and independently choose their experiments. As Bell's inequality isexperimentally violated, it appears that distant physical systems may behave as a single, nonlocal, indivisible entity. This apparent contradiction is resolved. It is shown that the “free will” assumption is, under usual circumstances, an excellent approximation.I have set before you life and death, blessing and cursing: therefore choose life.... —Deuteronomy XXX, 19.
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  8.  41
    Schrödinger's immortal cat.Asher Peres - 1988 - Foundations of Physics 18 (1):57-76.
    The purpose of this paper is to review and clarify the quantum “measurement problem.” The latter originates in the ambivalent nature of the “observer”: Although the observer is not described by the Schrödinger equation, it should nevertheless be possible to “quantize” him and include him in the wave function if quantum theory is universally valid. The problem is to prove that no contradiction may arise in these two conflicting descriptions. The proof invokes the notion of irreversibility. The validity of the (...)
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  9.  66
    What's Wrong with These Observables?Asher Peres - 2003 - Foundations of Physics 33 (10):1543-1547.
    An imprecise measurement of a dynamical variable (such as a spin component) does not, in general, give the value of another dynamical variable (such as a spin component along a slightly different direction). The result of the measurement cannot be interpreted as the value of any observable that has a classical analogue.
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  10. The physicist's role in physical laws.Asher Peres - 1980 - Foundations of Physics 10 (7-8):631-634.
    The physicist not only observes phenomena, but he also has an active role in the formulation of some laws. For instance, laws involving irreversibility refer explicitly to what can or cannot be done by physicists. As the abilities of the latter may vary, we obtain sequences of laws, the convergence of which is discussed.
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  11. Generalized Kochen-Specker theorem.Asher Peres - 1996 - Foundations of Physics 26 (6):807-812.
    A generalized Kochen-Specker theorem is proved. It is shown that there exist sets of n projection operators, representing n yes-no questions about a quantum system, such that none of the 2″ possible answers is compatible with sum rules imposed by quantum mechanics. Namely, if a subset of commuting projection operators sums up to a matrix having only even or only odd eigenvalues, the number of “yes” answers ought to he even or odd, respectively. This requirement may lead to contradictions. An (...)
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  12.  96
    Recursive definition for elements of reality.Asher Peres - 1992 - Foundations of Physics 22 (3):357-361.
    “Elements of reality” are defined as in the work of Einstein, Podolsky, and Rosen. It is further assumed that the sum or product of twocommuting elements of reality also is an element of reality. An algebra contradiction ensues.
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  13. Symposium on the Foundations of Modern Physics 1994.James B. Hartle, K. V. Laurikainen, Henry J. Folse D'Espagnat Paris, Asher Peres, Abner Shimony, Henry Stapp & Stig Stenholm - 1994 - Foundations of Physics 24 (2).
  14.  29
    Relativity and gravitation.Charles Goethe Kuper & Asher Peres (eds.) - 1971 - New York,: Gordon and Breach Science Publishers.
  15.  76
    Emergence of local realism in fuzzy observations of correlated quantum systems.Asher Peres - 1992 - Foundations of Physics 22 (6):819-828.
    A pair of spin-j particles, prepared in a singlet state, move away from each other and are examined by two distant observers. If the latter are able to discriminate between the2j+1 values of a component ofJ, there are pairs of observables whose correlation strongly violates Bell's inequality, for arbitrarily large j. However, if neighboring values are lumped together because of limited instrumental resolution, the observable correlations tend to those predicted by classical mechanics.
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  16.  33
    I Am the Cat Who Walks by Himself.Asher Peres - 2006 - Foundations of Physics 36 (1):1-18.
    The city of lions. Beaulieu-sur-Dordogne. The war starts. Drôle de guerre. Going to work. Going to school. Fleeing from village to village. Playing cat and mouse. The second landing. Return to Beaulieu. Return to Paris. Joining the boyscouts. Learning languages. Israel becomes independent. Arrival in Haifa. Kalay high school. Military training. The Hebrew Technion in Haifa. Relativity. Asher Peres. Metallurgy. Return to France. Escape from jail. Aviva.I am the cat who walks by himself, and all places are alike to me.Rudyard (...)
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  17. Mathematical Foundations of Quantum Theory.Asher Peres - 1978 - In A. R. Marlow (ed.), Mathematical Foundations of Quantum Theory. Academic Press. pp. 357.
     
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  18.  95
    Nathan Rosen, 1909–1995.Asher Peres - 1996 - Foundations of Physics 26 (3):289-290.
  19.  73
    Neumark's theorem and quantum inseparability.Asher Peres - 1990 - Foundations of Physics 20 (12):1441-1453.
    The most efficient way of obtaining information about the state of a quantum system is not always a direct measurement. It is sometimes preferable to extend the original Hilbert space of states into a larger space, and then to perform a quantum measurement in the enlarged space. Such an extension is always possible, by virtue of Neumark's theorem. The physical interpretation usually given to that theorem is the introduction of an auxiliary quantum system, prepared in a standard state, and the (...)
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