• 2019 International Workshop: Beyond Bell’s theorem

We are delighted to announce that IJQF will organize an online 2019 International Workshop: Beyond Bell’s theorem from 1 August 2019 to 1 September 2019. The workshop will bring together leading experts in the… Read more →

Weekly Papers on Quantum Foundations (29)

The Relativity Principle at the Foundation of Quantum Mechanics. (arXiv:2107.06942v1 [quant-ph]) 下午5:48 | W.M. Stuckey, Timothy McDevitt, Michael Silberstein | quant-ph updates on arXiv.org Quantum information theorists have created axiomatic reconstructions of quantum mechanics (QM) that are very successful at identifying precisely what distinguishes quantum probability theory from classical and more general probability theories in terms of information-theoretic principles. Herein,… Read more →

Weekly Papers on Quantum Foundations (28)

Is the problem of molecular structure just the quantum measurement problem? Foundations of Chemistry (2021) Sebastian Fortin & Olimpia Lombardi Abstract In a recent article entitled “The problem of molecular structure just is the measurement problem”, Alexander Franklin and Vanessa Seifert argue that insofar as the quantum measurement problem is solved, the problems of molecular structure are resolved as well…. Read more →

Weekly Papers on Quantum Foundations (27)

Self-testing of physical theories, or, is quantum theory optimal with respect to some information-processing task?. (arXiv:2003.00349v3 [quant-ph] UPDATED) 上午9:18 | Mirjam Weilenmann, Roger Colbeck | quant-ph updates on arXiv.org Self-testing usually refers to the task of taking a given set of observed correlations that are assumed to arise via a process that is accurately described by quantum theory, and trying… Read more →

Weekly Papers on Quantum Foundations (26)

R\’enyi entropy of magic. (arXiv:2106.12587v1 [quant-ph]) 上午9:37 | Lorenzo Leone, Salvatore F. E. Oliviero, Alioscia Hamma | quant-ph updates on arXiv.org We introduce a novel measure for the quantum property commonly known as $magic$ by considering the R\’enyi entropy of the probability distribution associated to a pure quantum state given by the square of the expectation value of Pauli strings… Read more →

Weekly Papers on Quantum Foundations (25)

On Causal State Updates in Quantum Field Theory. (arXiv:2106.09027v1 [quant-ph]) 上午10:21 | I. Jubb | quant-ph updates on arXiv.org In relativistic Quantum Field Theory (QFT) ideal measurements of certain observables are physically impossible without violating causality. This prompts two questions: i) can a given observable be ideally measured in QFT, and ii) if not, in what sense can it be… Read more →

Weekly Papers on Quantum Foundations (24)

Testing quantum theory with thought experiments. (arXiv:2106.05314v1 [quant-ph]) 上午9:49 | Nuriya Nurgalieva, Renato Renner | quant-ph updates on arXiv.org Quantum mechanics is one of our most successful physical theories; its predictions agree with experimental observations to an extremely high accuracy. However, the bare formalism of quantum theory does not provide straightforward answers to seemingly simple questions: for example, how should… Read more →

Weekly Papers on Quantum Foundations (23)

Testing Bell inequalities in Higgs boson decays. (arXiv:2106.01377v1 [hep-ph]) 下午5:25 | Alan Barr | quant-ph updates on arXiv.org Higgs boson decays produce pairs of W bosons in a maximally entangled state, the spins of which can be expected to violate Bell inequalities. We show that the spin density matrix of the $W^\pm$ pair may be reconstructed experimentally from the directions… Read more →

Collapse-in and Collapse-out in Partial Measurement in Quantum Mechanics and its WISE Interpretation

Gui-Lu Long (Tsinghua University) SCIENCE CHINA Physics, Mechanics & Astronomy, (2021)  https://doi.org/10.1007/s11433-021-1716-y In this short communication, we will concentrate onthe partial measurement issue and give an explanationconcerning the WISE interpretation. The essential ideaof WISE is given in Ref. [4], together with the linearcombination of unitaries (LCU) formalism of quantumcomputing. LCU has now become one of the major techniquesin quantum algorithm design…. Read more →

Weekly Papers on Quantum Foundations (22)

Faking quantum probabilites: Beyond Bell’s theorem and Tsirelson bounds. (arXiv:2105.12728v1 [quant-ph]) 上午8:50 | Marek Czachor, Kamil Nalikowski | quant-ph updates on arXiv.org Local hidden-variable model of singlet-state correlations discussed in M. Czachor, Arithmetic loophole in Bell’s Theorem: Overlooked threat to entangled-state quantum cryptography”, Acta Phys. Polon. A 139, 70-83 (2021), is shown to be a particular case of an infinite… Read more →