The Negativity‐to‐Violation Map between Wigner Function and Quantum Contextuality Inequality for a Single Qudit
Sign Up to like & getrecommendations! Published in 2019 at "Annalen der Physik"
DOI: 10.1002/andp.201800464
Abstract: The relation between discrete Wigner function and quantum contextuality based on graph theory has been studied, following the work in [Nature 510,351(2014)]. To do this, non‐stabilizer projectors have been introduced to a series of non‐contextuality… read more here.
Keywords: quantum contextuality; contextuality; wigner function; qudit ... See more keywords
Is contextuality about the identity of random variables?
Sign Up to like & getrecommendations! Published in 2019 at "Foundations of Physics"
DOI: 10.1007/s10701-021-00402-7
Abstract: Recent years have seen new general notions of contextuality emerge. Most of these employ context-independent symbols to represent random variables in different contexts. As an example, the operational theory of (Spekkens in Phys Rev A… read more here.
Keywords: random variables; theory; contextuality; contextuality identity ... See more keywords
Testing Temporal Contextuality with Quantum Entangled Histories
Sign Up to like & getrecommendations! Published in 2019 at "International Journal of Theoretical Physics"
DOI: 10.1007/s10773-019-04144-1
Abstract: Quantum contextuality is a fundamental feature of quantum theory, which has been demonstrated in spatial scenario theoretically and experimentally. In this paper, we proposed a scheme to test temporal contextuality with a two-time entangled history… read more here.
Keywords: contextuality quantum; testing temporal; contextuality; temporal contextuality ... See more keywords
Single-Photon Quantum Contextuality on a Chip
Sign Up to like & getrecommendations! Published in 2017 at "ACS Photonics"
DOI: 10.1021/acsphotonics.7b00793
Abstract: In classical physics, properties of objects exist independently of the context, i.e., whether and how measurements are performed. Quantum physics showed this assumption to be wrong, and that Nature is indeed “contextual”. Contextuality has been… read more here.
Keywords: quantum contextuality; contextuality; physics; single photon ... See more keywords
Revealing universal quantum contextuality through communication games
Sign Up to like & getrecommendations! Published in 2019 at "Scientific Reports"
DOI: 10.1038/s41598-019-53701-5
Abstract: An ontological model of an operational theory is considered to be universally noncontextual if both preparation and measurement noncontextuality assumptions are satisfied in that model. In this report, we first generalize the logical proofs of… read more here.
Keywords: quantum contextuality; communication; contextuality; universal quantum ... See more keywords
Contextuality of identical particles
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review A"
DOI: 10.1103/physreva.95.012133
Abstract: A generalisation of quantum contextuality to the case of many indentical particles is presented. The model consists of a finite collection of modes that can be occupied by N particles, either bosons or fermions. Measurement… read more here.
Keywords: occupation; contextuality identical; contextuality; scenario ... See more keywords
Graph-theoretic strengths of contextuality
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review A"
DOI: 10.1103/physreva.95.032108
Abstract: Cabello-Severini-Winter and Abramsky-Hardy (building on the framework of Abramsky-Brandenburger) both provide classes of Bell and contextuality inequalities for very general experimental scenarios using vastly different mathematical techniques. We review both approaches, carefully detail the links… read more here.
Keywords: contextuality; graph theoretic; strengths contextuality; theoretic strengths ... See more keywords
Experimental Detection of Information Deficit in a Photonic Contextuality Scenario.
Sign Up to like & getrecommendations! Published in 2017 at "Physical review letters"
DOI: 10.1103/physrevlett.119.220403
Abstract: Contextuality is an essential characteristic of quantum theory, and supplies the power for many quantum information processes. Previous tests of contextuality focus mainly on the probability distribution of measurement results. However, a test of contextuality… read more here.
Keywords: information; contextuality; information deficit; experimental detection ... See more keywords
Optimal Classical Simulation of State-Independent Quantum Contextuality.
Sign Up to like & getrecommendations! Published in 2018 at "Physical review letters"
DOI: 10.1103/physrevlett.120.130401
Abstract: Simulating quantum contextuality with classical systems requires memory. A fundamental yet open question is what is the minimum memory needed and, therefore, the precise sense in which quantum systems outperform classical ones. Here, we make… read more here.
Keywords: quantum contextuality; state independent; quantum; contextuality ... See more keywords
Certifying Quantum Signatures in Thermodynamics and Metrology via Contextuality of Quantum Linear Response.
Sign Up to like & getrecommendations! Published in 2020 at "Physical review letters"
DOI: 10.1103/physrevlett.125.230603
Abstract: I identify a fundamental difference between classical and quantum dynamics in the linear response regime by showing that the latter is, in general, contextual. This allows me to provide an example of a quantum engine… read more here.
Keywords: quantum; thermodynamics; linear response; contextuality ... See more keywords
Converting Contextuality into Nonlocality.
Sign Up to like & getrecommendations! Published in 2021 at "Physical review letters"
DOI: 10.1103/physrevlett.127.070401
Abstract: We introduce a general method which converts, in a unified way, any form of quantum contextuality, including any form of state-dependent contextuality, into a quantum violation of a bipartite Bell inequality. As an example, we… read more here.
Keywords: quantum; converting contextuality; contextuality nonlocality; contextuality ... See more keywords