Eliahu Cohen

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Protective Measurement, Postseletion and the Heisenberg Representation by Yakir Aharonov and Eliahu Cohen

This is the third chapter of the anthology Protective Measurement And Quantum Reality (CUP, 2014). Here is its abstract: Classical ergodicity retains its meaning in the quantum realm when the employed measurement is protective. This unique measuring technique is re-examined in the case of post-selection, giving rise to novel insights studied in the Heisenberg representation. Quantum statistical mechanics is then briefly described in terms… Read more →

Weekly Papers on Quantum Foundations (41)

Experimental evidence for the Unruh effect. (arXiv:1903.00043v3 [gr-qc] UPDATED) 2019年10月18日 星期五 下午7:34 | gr-qc updates on arXiv.org Authors: Morgan H. Lynch, Eliahu Cohen, Yaron Hadad, Ido Kaminer We examine the radiation emitted by high energy positrons channeled into silicon crystal samples. The positrons are modeled as semiclassical vector currents coupled to an Unruh-DeWitt detector to incorporate any local change in the energy of the… Read more →

Weekly Papers on Quantum Foundations (20)

A different perspective on the problem of time in quantum gravity. (arXiv:1905.09860v1 [gr-qc])  gr-qc updates on arXiv.org on 2019-5-28 12:29am GMT Authors: Mariano Bauer, Cesar Augusto Aguillon, Gustavo Garcia The perspective is advanced that the time parameter in quantum mechanics corresponds to the time coordinate in a Minkowski flat spacetime local approximation to the actual dynamical curved spacetime of General Relativity, rather than… Read more →

Realism and Causality II: Retrocausality in Energetic Causal Sets

Eliahu Cohen, Marina Cortês, Avshalom C. Elitzur, Lee Smolin (Submitted on 13 Feb 2019 (v1), last revised 19 Mar 2019 (this version, v2)) https://arxiv.org/abs/1902.05082v2 We describe a new form of retrocausality, which is found in the behaviour of a class of causal set theories, called energetic causal sets (ECS). These are discrete sets of events, connected by causal relations. They have three orders:… Read more →

Realism and causality I: Pilot wave and retrocausal models as possible facilitators

Eliahu Cohen, Marina Cortês, Avshalom C. Elitzur, Lee Smolin (Submitted on 13 Feb 2019 (v1), last revised 19 Mar 2019 (this version, v2)) https://arxiv.org/abs/1902.05108v2 Of all basic principles of classical physics, realism should arguably be the last to be given up when seeking a better interpretation of quantum mechanics. We examine the de Broglie-Bohm pilot wave theory as a well developed example of… Read more →

Weekly Papers on Quantum Foundations (41)

Realism about the Wave Function  Philsci-Archive: No conditions. Results ordered -Date Deposited. on 2018-10-14 2:01am GMT Chen, Eddy Keming (2018) Realism about the Wave Function. [Preprint] Against Fundamentalism  Philsci-Archive: No conditions. Results ordered -Date Deposited. on 2018-10-14 1:57am GMT Leifer, Matthew (2018) Against Fundamentalism. [Preprint] Quantum Mechanics in a Time-Asymmetric Universe: On the Nature of the Initial Quantum State  The… Read more →

Weekly Papers on Quantum Foundations (20)

Lets Talk About Black Hole Singularities. (arXiv:1805.05865v2 [physics.pop-ph] CROSS LISTED)  hep-th updates on arXiv.org on 2018-5-19 12:49am GMT Authors: Abraham Loeb (Harvard) Does the collision of black hole singularities imprint an observable quantum signature on the resulting gravitational wave signal? Stephen Hawking: To Understand the Universe. (arXiv:1803.09197v2 [physics.hist-ph] UPDATED)  hep-th updates on arXiv.org on 2018-5-19 12:49am GMT Authors: James B. Hartle (UCSB and SFI)… Read more →

Weekly Papers on Quantum Foundations (39)

Magnetic monopoles and nonassociative deformations of quantum theory. (arXiv:1709.10080v1 [hep-th])  hep-th updates on arXiv.org on 2017-9-29 1:58am GMT Authors: Richard J. Szabo We examine certain nonassociative deformations of quantum mechanics and gravity in three dimensions related to the dynamics of electrons in uniform distributions of magnetic charge. We describe a quantitative framework for nonassociative quantum mechanics in this setting, which exhibits… Read more →

Weekly Papers on Quantum Foundations (38)

How to make a quantum black hole with ultra-cold gases. (arXiv:1709.07189v1 [cond-mat.quant-gas])  hep-th updates on arXiv.org on 2017-9-22 12:53am GMT Authors: Ippei Danshita, Masanori Hanada, Masaki Tezuka The realization of quantum field theories on an optical lattice is an important subject toward the quantum simulation. We argue that such efforts would lead to the experimental realizations of quantum black holes. The basic idea… Read more →

Weekly Papers on Quantum Foundations (33)

No smooth beginning for spacetime. (arXiv:1705.00192v2 [hep-th] UPDATED)  gr-qc updates on arXiv.org on 2017-8-19 8:40am GMT Authors: Job Feldbrugge, Jean-Luc Lehners, Neil Turok We identify a fundamental obstruction to any theory of the beginning of the universe, formulated as a semiclassical path integral. Hartle and Hawking’s no boundary proposal and Vilenkin’s tunneling proposal are examples of such theories. Each may be formulated as… Read more →