Weekly Papers on Quantum Foundations (45)

Published by on

Statistics on Lefschetz thimbles: Bell/Leggett-Garg inequalities and the classical-statistical approximation. (arXiv:2011.02657v1 [hep-th]) 上午10:08 | Zong-Gang Mou, Peter Millington, Paul M. Saffin, Anders Tranberg | quant-ph updates on arXiv.org Inspired by Lefschetz thimble theory, we treat Quantum Field Theory as a statistical theory with a complex Probability Distribution Function (PDF). Such complex-valued PDFs permit the violation of Bell-type inequalities, which cannot… Read more →

Weekly Papers on Quantum Foundations (44)

Published by on

How do I introduce Schr\”odinger equation during the quantum mechanics course?. (arXiv:2010.15589v1 [physics.ed-ph]) 上午10:31 | T. Mart | quant-ph updates on arXiv.org In this paper I explain how I usually introduce the Schr\”odinger equation during the quantum mechanics course. My preferred method is the chronological one. Since the Schr\”odinger equation belongs to a special case of wave equations I start… Read more →

Weekly Papers on Quantum Foundations (43)

Published by on

Everettian probabilities, the Deutsch-Wallace theorem and the Principal Principle. (arXiv:2010.11591v1 [quant-ph]) 2020年10月23日 星期五 下午4:54 | Harvey R. Brown, Gal Ben Porath | quant-ph updates on arXiv.org This paper is concerned with the nature of probability in physics, and in quantum mechanics in particular. It starts with a brief discussion of the evolution of Itamar Pitowsky’s thinking about probability in quantum… Read more →

Weekly Papers on Quantum Foundations (42)

Published by on

Time-Symmetry Breaking in Hamiltonian Mechanics. II. A Memoir for Berni Julian Alder [1925-2020]. (arXiv:2010.02084v4 [physics.hist-ph] UPDATED) 2020年10月16日 星期五 下午8:09 | physics.hist-ph updates on arXiv.org Authors: William Graham Hoover, Carol Griswold Hoover This memoir honors the late Berni Julian Alder, who inspired both of us with his pioneering development of molecular dynamics. Berni’s work with Tom Wainwright, described in the 1959 Scientific American[1],… Read more →

Einstein’s missed opportunity to rid us of ‘spooky actions at a distance’

Published by on

Why do moving rulers shrink (length contraction) and moving clocks run slow (time dilation) such that everyone measures the same speed of light c, regardless of their relative motions? Einstein resolved this mystery at the turn of the 20th century in “principle fashion” by turning the question on its head. He invoked the relativity principle (AKA “no preferred reference frame”) and… Read more →

Superselection rule in the problem of scattering a particle on a one-dimensional delta-potential

Published by on

Recently, discussions of fundamental problems of (non-relativistic) quantum mechanics usually concern Bell’s inequalities. As for the discussions around the Schrödinger’s cat paradox, they faded into the background. At the same time, the discussion of Bell’s inequalities suggests that the Schrödinger’s cat paradox has already been resolved. Therefore, it is worth returning to the Schrödinger’s cat paradox to make sure that,… Read more →

Weekly Papers on Quantum Foundations (41)

Published by on

Quantum measurement incompatibility in subspaces. (arXiv:2010.04048v1 [quant-ph]) 上午9:34 | Roope Uola, Tristan Kraft, Sébastien Designolle, Nikolai Miklin, Armin Tavakoli, Juha-Pekka Pellonpää, Otfried Gühne, Nicolas Brunner | quant-ph updates on arXiv.org We consider the question of characterising the incompatibility of sets of high-dimensional quantum measurements. We introduce the concept of measurement incompatibility in subspaces. That is, starting from a set of… Read more →

Weekly Papers on Quantum Foundations (40)

Published by on

Gauge Is More Than Mathematical Redundancy 2020年9月30日 星期三 上午1:12 | Philsci-Archive: No conditions. Results ordered -Date Deposited. ROVELLI, Carlo (2020) Gauge Is More Than Mathematical Redundancy. [Preprint] Measurement and Quantum Dynamics in the Minimal Modal Interpretation of Quantum Theory 上午4:41 | Philsci-Archive: No conditions. Results ordered -Date Deposited. Barandes, Jacob A. and Kagan, David (2020) Measurement and Quantum Dynamics in… Read more →

Weekly Papers on Quantum Foundations (39)

Published by on

Towards the Heisenberg limit in microwave photon detection by a qubit array. (arXiv:2009.11271v2 [quant-ph] UPDATED) 上午9:49 | P. Navez, A. G. Balanov, S. E. Savel’ev, A. M. Zagoskin | quant-ph updates on arXiv.org Using an analytically solvable model, we show that a qubit array-based detector allows to achieve the fundamental Heisenberg limit in detecting single photons. In case of superconducting… Read more →