Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Ravi Kunjwal"'
Autor:
David Schmid, Thomas C. Fraser, Ravi Kunjwal, Ana Belen Sainz, Elie Wolfe, Robert W. Spekkens
Publikováno v:
Quantum, Vol 7, p 1194 (2023)
A standard approach to quantifying resources is to determine which operations on the resources are freely available, and to deduce the partial order over resources that is induced by the relation of convertibility under the free operations. If the re
Externí odkaz:
https://doaj.org/article/ee30e3e6d59c47bb841a0bd6946b5330
Autor:
Victoria J Wright, Ravi Kunjwal
Publikováno v:
Quantum, Vol 7, p 900 (2023)
The Kochen–Specker (KS) theorem reveals the nonclassicality of single quantum systems. In contrast, Bell's theorem and entanglement concern the nonclassicality of composite quantum systems. Accordingly, unlike incompatibility, entanglement and Bell
Externí odkaz:
https://doaj.org/article/04318ea7f9e941179f5854c58161925f
Autor:
Shiv Akshar Yadavalli, Ravi Kunjwal
Publikováno v:
Quantum, Vol 6, p 839 (2022)
We consider the problem of entanglement-assisted one-shot classical communication. In the zero-error regime, entanglement can increase the one-shot zero-error capacity of a family of classical channels following the strategy of Cubitt et al., Phys. R
Externí odkaz:
https://doaj.org/article/c9f9f82794364633b1b151d34394af5b
Publikováno v:
PRX Quantum, Vol 2, Iss 1, p 010331 (2021)
To make precise the sense in which the operational predictions of quantum theory conflict with a classical worldview, it is necessary to articulate a notion of classicality within an operational framework. A widely applicable notion of classicality o
Externí odkaz:
https://doaj.org/article/1659df0206b44c95b1726a6035388450
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-7 (2016)
No noncontextual hidden-variable model can be consistent with quantum theory, but proving such an inconsistency with nature itself is a long-standing problem. Here, the authors devise experimentally-achievable tests of noncontextuality and perform a
Externí odkaz:
https://doaj.org/article/d0e6983c937848bfa7d4de161c59e868
Autor:
Nikola Andrejic, Ravi Kunjwal
Publikováno v:
Physical Review Research, Vol 2, Iss 4, p 043147 (2020)
Measurements in quantum theory exhibit incompatibility, i.e., they can fail to be jointly measurable. An intuitive way to represent the (in)compatibility relations among a set of measurements is via a hypergraph representing their joint measurability
Externí odkaz:
https://doaj.org/article/e2e82fef46af43cfbad63f8a4b3c7d6c
Publikováno v:
Quantum, Vol 4, p 280 (2020)
We take a resource-theoretic approach to the problem of quantifying nonclassicality in Bell scenarios. The resources are conceptualized as probabilistic processes from the setting variables to the outcome variables having a particular causal structur
Externí odkaz:
https://doaj.org/article/ae4082b26f824ec39f6fd76a3a05e549
Autor:
Ravi Kunjwal
Publikováno v:
Quantum, Vol 4, p 219 (2020)
Kochen-Specker (KS) theorem reveals the inconsistency between quantum theory and any putative underlying model of it satisfying the constraint of KS-noncontextuality. A logical proof of the KS theorem is one that relies only on the compatibility rela
Externí odkaz:
https://doaj.org/article/3710ec9517474d999a1360f28c3ae451
Autor:
Ravi Kunjwal
Publikováno v:
Quantum, Vol 3, p 184 (2019)
We develop a hypergraph-theoretic framework for Spekkens contextuality applied to Kochen-Specker (KS) type scenarios that goes beyond the Cabello-Severini-Winter (CSW) framework. To do this, we add new hypergraph-theoretic ingredients to the CSW fram
Externí odkaz:
https://doaj.org/article/344207cf27304a3e9e51592664b3f30b
Publikováno v:
Quantum, Vol 2, p 87 (2018)
Ernst Specker considered a particular feature of quantum theory to be especially fundamental, namely that pairwise joint measurability of sharp measurements implies their global joint measurability ($\href{https://vimeo.com/52923835}{vimeo.com/529238
Externí odkaz:
https://doaj.org/article/3c6d018accf64746bd31b1cd4b5d733d