Interaction-Free Effects Between Distant Atoms

Aharonov, Yakir; Cohen, Eliahu; Elitzur, Avshalom C.; Smolin, Lee

doi:10.1007/s10701-017-0127-y

Cited by 20 publications

(17 citation statements)

References 71 publications

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“…Therefore, we have claimed above that any kind of non-zero traces, either a single-particle trace or a multiparticle trace, should be considered as "presence" and should play a role when determining the past of a composite system. Another example emphasizing the importance of multipartite correlations was discussed in [31].…”

Section: Discussionmentioning

confidence: 99%

Past of a particle in an entangled state

Paneru

Cohen

2017

Int. J. Quantum Inform.

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Vaidman has proposed a controversial criterion for determining the past of a single quantum particle based on the "weak trace" it leaves. We here consider more general examples of entangled systems and analyze the past of single, as well as pairs of entangled pre- and postselected particles. Systems with non-trivial time evolution are also analyzed. We argue that in these cases, examining only the single-particle weak trace provides information which is insufficient for understanding the system as a whole. We therefore suggest to examine, alongside with the past of single particles, also the past of pairs, triplets and eventually the entire system, including higher-order, multipartite traces in the analysis. This resonates with a recently proposed top-down approach by Aharonov, Cohen and Tollaksen for understanding the structure of correlations in pre- and postselected systems.Comment: Added one reference and corrected a typo. Accepted to Int. J. Quantum In

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Section: Discussionmentioning

confidence: 99%

Past of a particle in an entangled state

Paneru

Cohen

2017

Int. J. Quantum Inform.

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“…We recently suggested another paradox [12] belonging to the same family. Two atoms are prepared, one excited and one ground: eg  …”

Section: From Superposition To Quantum Entanglement -The Quantum Liarmentioning

confidence: 99%

“…We assume that a photon emitted from the first would necessarily excite the second. We wait the half-life time and now, apart from a few technicalities described in [12] we are sure that the atoms are entangled  …”

Section: From Superposition To Quantum Entanglement -The Quantum Liarmentioning

confidence: 99%

Unveiling the curtain of superposition: Recent gedanken and laboratory experiments

Cohen

Elitzur²

2017

J. Phys.: Conf. Ser.

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What is the true meaning of quantum superposition? Can a particle genuinely reside in several places simultaneously? These questions lie at the heart of this paper which presents an updated survey of some important stages in the evolution of the three-boxes paradox, as well as novel conclusions drawn from it. We begin with the original thought experiment of Aharonov and Vaidman, and proceed to its non-counterfactual version. The latter was recently realized by Okamoto and Takeuchi using a quantum router. We then outline a dynamic version of this experiment, where a particle is shown to "disappear" and "re-appear" during the time evolution of the system. This surprising prediction based on self-cancellation of weak values is directly related to our notion of Quantum Oblivion. Finally, we present the non-counterfactual version of this disappearing-reappearing experiment. Within the near future, this last version of the experiment is likely to be realized in the lab, proving the existence of exotic hitherto unknown forms of superposition. With the aid of Bell's theorem, we prove the inherent nonlocality and nontemporality underlying such pre-and post-selected systems, rendering anomalous weak values ontologically real. Scarbo (translated to English), from Gaspard de la nuit / Aloysius Bertrand

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“…Several alternative approaches have been proposed to gain information about systems other than by conventional quantum mechanics measurement. Such approaches are known as weak measurement [249,250], protective measurement [224,251] and interaction-free measurement [252,253]. The understanding of such processes, and their results, depends on which approach is taken to understanding quantum mechanics generally and, within that, how conventional measurement is understood [206,[254][255][256][257][258].…”

Section: Measurement Decoherence and Uncertaintymentioning

confidence: 99%

Understanding quantum mechanics: a review and synthesis in precise language

Drummond¹

2019

Open Physics

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This review, of the understanding of quantum mechanics, is broad in scope, and aims to reflect enough of the literature to be representative of the current state of the subject. To enhance clarity, the main findings are presented in the form of a coherent synthesis of the reviewed sources. The review highlights core characteristics of quantum mechanics. One is statistical balance in the collective response of an ensemble of identically prepared systems, to differing measurement types. Another is that states are mathematical terms prescribing probability aspects of future events, relating to an ensemble of systems, in various situations. These characteristics then yield helpful insights on entanglement, measurement, and widely-discussed experiments and analyses. The review concludes by considering how these insights are supported, illustrated and developed by some specific approaches to understanding quantum mechanics. The review uses non-mathematical language precisely (terms defined) and rigorously (consistent meanings), and uses only such language. A theory more descriptive of independent reality than is quantum mechanics may yet be possible. One step in the pursuit of such a theory is to reach greater consensus on how to understand quantum mechanics. This review aims to contribute to achieving that greater consensus, and so to that pursuit.

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Interaction-Free Effects Between Distant Atoms

Cited by 20 publications

References 71 publications

Past of a particle in an entangled state

Past of a particle in an entangled state

Unveiling the curtain of superposition: Recent gedanken and laboratory experiments

Understanding quantum mechanics: a review and synthesis in precise language

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