Weekly Papers on Quantum Foundations (42)

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’

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

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)

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)

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)

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 →

Weekly Papers on Quantum Foundations (38)

Finding the world in the wave function: some strategies for solving the macro-object problem 上午8:00 | Latest Results for Synthese Abstract Realists wanting to capture the facts of quantum entanglement in a metaphysical interpretation find themselves faced with several options: to grant some species of fundamental nonseparability, adopt holism, or (more radically) to view localized spacetime systems as ultimately reducible… Read more →

Weekly Papers on Quantum Foundations (37)

Underground test of gravity-related wave function collapse 2020年9月7日 星期一 上午8:00 | Angelo Bassi | Nature Physics – Issue – nature.com science feeds Nature Physics, Published online: 07 September 2020; doi:10.1038/s41567-020-1008-4The radiation emission rate from gravity-related wave function collapse is calculated and the results of a dedicated experiment at the Gran Sasso laboratory are reported, ruling out the natural parameter-free version of… Read more →

Weekly Papers on Quantum Foundations (36)

Violation of Heisenberg’s Error-Disturbance Relation by Stern-Gerlach Measurements. (arXiv:2009.01646v1 [quant-ph]) 上午10:15 | Yuki Inoue, Masanao Ozawa | quant-ph updates on arXiv.org Although “Heisenberg’s uncertainty principle” is represented by a rigorously proven relation about intrinsic indeterminacy in quantum states, Heisenberg’s error-disturbance relation (EDR) has been commonly believed as another aspect of the principle. However, recent developments of quantum measurement theory made… Read more →