Pre- and Post-Selected Ensembles and Time-Symmetry in Quantum Mechanics
نویسندگان
چکیده
منابع مشابه
The Curious Quantum Mechanics of Pre- and Post-Selected Ensembles
In a provocative paper, (~) Albert, Aharonov, and D'Amato proposed an analysis of preand post-selected ensembles in quantum mechanics (PPS ensembles) which seemed to show that in the interval between preand post-selection, certain noncommuting observables all have determinate values. Moreover, these values are context dependent: The value assumed by a degenerate observable (e.g., an observable ...
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A quantum key distribution scheme whose security depends on the features of preand post-selected quantum ensembles is described. PACS numbers: 03.65.Bz, 42.80.Sa, 89.70.+c A wide variety of quantum key distribution schemes have been proposed, following the original Bennett and Brassard protocol [1]. Ekert [2] has described a scheme in which two parties, Alice and Bob, create a shared random key...
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We describe a gedanken experiment with an interferometer in the case of preand postselection in two different time symmetric ways: We apply the ABL formalism and the de Broglie–Bohm model. Interpreting these descriptions ontologically, we get two very different concepts of reality. Finally, we discuss some problems implied by these concepts.
متن کاملQuantum mechanics of time travel through post-selected teleportation
Citation Lloyd, Seth et al. " Quantum mechanics of time travel through post-selected teleportation. " Physical Review D 84 (2011): n. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Y...
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All of these time asymmetries could arise from time-symmetric dynamical laws solved with time-asymmetric boundary conditions. The thermodynamic arrow of time, for example, is implied by an initial condition in which the progenitors of today’s approximately isolated systems were all far from equilibrium at an initial time. The CP arrow of time could arise as a spontaneously broken symmetry of th...
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ژورنال
عنوان ژورنال: International Journal of Theoretical Physics
سال: 2008
ISSN: 0020-7748,1572-9575
DOI: 10.1007/s10773-008-9876-x