Contextuality and the fundamental theorems of quantum mechanics [PDF]
, 2020 Contextuality is a key feature of quantum mechanics, as was first brought to light by Bohr and later realised more technically by Kochen and Specker.
Frembs, Markus +3 more
core +3 more sources
Hypergraph framework for irreducible noncontextuality inequalities from logical proofs of the Kochen-Specker theorem [PDF]
Quantum, 2020 Kochen-Specker (KS) theorem reveals the inconsistency between quantum theory and any putative underlying model of it satisfying the constraint of KS-noncontextuality.
Ravi Kunjwal
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Topological Contextuality and Anyonic Statistics of Photonic-Encoded Parafermions
PRX Quantum, 2021 Quasiparticle poisoning, expected to arise during the measurement of the Majorana zero-mode state, poses a fundamental problem for the realization of Majorana-based quantum computation.
Zheng-Hao Liu +15 more
doaj +1 more source
Revealing quantum contextuality using a single measurement device [PDF]
Physical Review A, 2021 In this work we analyse the notion of measurement non-contextuality (MNC) and identify contextual scenarios which involve sequential measurements of only a single measurement device.
Jaskaran Singh, R. S. Bhati, Arvind
semanticscholar +1 more source
Sum-of-squares decompositions for a family of noncontextuality inequalities and self-testing of quantum devices [PDF]
Quantum, 2020 Violation of a noncontextuality inequality or the phenomenon referred to `quantum contextuality' is a fundamental feature of quantum theory. In this article, we derive a novel family of noncontextuality inequalities along with their sum-of-squares ...
Debashis Saha +2 more
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Bounding and Simulating Contextual Correlations in Quantum Theory
PRX Quantum, 2021 We introduce a hierarchy of semidefinite relaxations of the set of quantum correlations in generalized contextuality scenarios. This constitutes a simple and versatile tool for bounding the magnitude of quantum contextuality.
Armin Tavakoli +3 more
doaj +1 more source
Contextuality, coherences, and quantum Cheshire cats [PDF]
New Journal of Physics, 2023 We analyse the quantum Cheshire cat using contextuality theory, to see if this can tell us anything about how best to interpret this paradox. We show that this scenario can be analysed using the relation between three different measurements, which seem ...
Jonte R Hance, Ming Ji, H. Hofmann
semanticscholar +1 more source
Noise-robust preparation contextuality shared between any number of observers via unsharp measurements [PDF]
Quantum, 2021 Multiple observers who independently harvest nonclassical correlations from a single physical system share the system's ability to enable quantum correlations.
Hammad Anwer +5 more
doaj +1 more source
Event-based quantum contextuality theory [PDF]
Fully revealing the mathmatical structure of quantum contextuality is a significant task, while some known contextuality theories are only applicable for rank-1 projectors. That is because they adopt the observable-based definitions. This paper overcomes
Jia, Yunyi +3 more
core +6 more sources
Tests of quantum contextuality in particle physics [PDF]
Physical Review DQuantum contextuality refers to the impossibility of assigning a predefined, intrinsic value to a physical property of a system independently of the context in which the property is measured.
M. Fabbrichesi +3 more
semanticscholar +1 more source