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Artículo
Quantum nonlocality via local contextuality with qubit-qubit entanglement
(American Physical Society, 2016-04-28)
Quantum nonlocality can be revealed “via local contextuality” in qudit-qudit entangled systems with d > 2 , that is, through the violation of inequalities containing Alice-Bob correlations that admit a local description, ...
Artículo
Noncontextual wirings
(American Physical Society, 2018-03-29)
Contextuality is a fundamental feature of quantum theory necessary for certain models of quantum computation and communication. Serious steps have therefore been taken towards a formal framework for contextuality as an ...
Artículo
Necessary and sufficient condition for contextuality from incompatibility
(American Physical Society, 2019-02-12)
Measurement incompatibility is the most basic resource that distinguishes quantum from classical physics. Contextuality is the critical resource behind the power of some models of quantum computation and is also a necessary ...
Artículo
Converting contextuality into nonlocality
(American Physical Society, 2021-08)
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, ...
Artículo
The quantum maxima for the basic graphs of exclusivity are not reachable in Bell scenarios
(The Royal Society, 2024)
A necessary condition for the probabilities of a set of events to exhibit Bell nonlocality or Kochen-Specker contextuality is that the graph of exclusivity of the events contains induced odd cycles with five or more vertices, ...
Artículo
Bell non-locality and Kochen-Specker contextuality: how are they connected?
(Springer, 2021-05-22)
Bell non-locality and Kochen–Specker (KS) contextuality are logically independent concepts, fuel different protocols with quantum vs classical advantage, and have distinct classical simulation costs. A natural question is ...
Artículo
Graph-theoretic approach to dimension witnessing
(IOP Publishing, 2021-03)
A fundamental problem in quantum computation and quantum information is finding the minimum quantum dimension needed for a task. For tasks involving state preparation and measurements, this problem can be addressed using ...
Artículo
Quantum contextuality, causality and freedom of choice
(The Royal Society, 2024-01-29)
The theme of this issue is ‘Quantum contextuality, causality and freedom of choice.’ Contextuality, including non-locality as its special case, has long since becomeone of the central topics in foundations of quantum ...
Artículo
Quantum contextuality provides communication complexity advantage
(American Physical Society, 2023-02-24)
Despite the conceptual importance of contextuality in quantum mechanics, there is a hitherto limited number of applications requiring contextuality but not entanglement. Here, we show that for any quantum state and observables ...
Artículo
Certifying sets of quantum observables with any full-rank state
(American Physical Society, 2024-04-03)
We show that some sets of quantum observables are unique up to an isometry and have a contextuality witness that attains the same value for any initial state. We prove that these two properties make it possible to certify ...