Results 101 to 110 of about 9,786 (198)

Formalizing Bell Nonlocality

open access: yes, 2019
Abstract This chapter covers the essential mathematical tools for the study of nonlocality. It begins with the main object under study: a collection of several probability distributions usually called “behavior”. The crucial definition of locality is then given, followed by Fine’s theorem that relates local behaviors to pre-existing ...
openaire   +1 more source

Entanglement and Bell nonlocality in τ + τ − at the BEPC

open access: yesJournal of High Energy Physics
Quantum entanglement and Bell nonlocality are two phenomena that occur only in quantum systems. In both cases, these are correlations between two subsystems that are classically absent.
Tao Han, Matthew Low, Youle Su
doaj   +1 more source

Violation of No‐Signaling on a Public Quantum Computer

open access: yesAdvanced Quantum Technologies, Volume 8, Issue 6, June 12, 2025.
No‐signaling is the simplest consequence of lack of communication, assumed in Bell tests of nonlocality. Its violation indicated serious malfunction of the system. Tested on IBM Quantum, no‐signaling turned out to be violated at various configurations. As simple crosstalk cannot explain it, an urgent investigation of the origin is necessary.
Tomasz Rybotycki   +3 more
wiley   +1 more source

Semi-device-independent information processing with spatiotemporal degrees of freedom

open access: yesPhysical Review Research, 2020
Nonlocality, as demonstrated by the violation of Bell inequalities, enables device-independent cryptographic tasks that do not require users to trust their apparatus. In this article, we consider devices whose inputs are spatiotemporal degrees of freedom,
Andrew J. P. Garner   +2 more
doaj   +1 more source

Nonlocal continuous variable correlations and violation of Bell's inequality for light beams with topological singularities

open access: yes, 2013
We consider optical beams with topological singularities which possess Schmidt decomposition and show that such classical beams share many features of two mode entanglement in quantum optics.
Agarwal, G. S.   +2 more
core   +1 more source

Classical Causal Models for Bell and Kochen-Specker Inequality Violations Require Fine-Tuning

open access: yesPhysical Review X, 2018
Nonlocality and contextuality are at the root of conceptual puzzles in quantum mechanics, and they are key resources for quantum advantage in information-processing tasks.
Eric G. Cavalcanti
doaj   +1 more source

Quantum Correlations Between Identical and Unidentical Atoms in a Dissipative Environment

open access: yes, 2011
We have studied the dynamics of quantum correlations such as entanglement, Bell-nonlocality and quantum discord between identical as well as unidentical atoms interacting with a single-mode cavity field and subject to cavity decay.
Altintas, Ferdi, Eryigit, Resul
core   +1 more source

Catalytic Activation of Bell Nonlocality

open access: yesPhysical Review Letters
The correlations of certain entangled states can be perfectly simulated classically via a local model. Hence such states are termed Bell local, as they cannot lead to Bell inequality violation. Here, we show that Bell nonlocality can nevertheless be activated for certain Bell-local states via a catalytic process.
Jessica Bavaresco   +4 more
openaire   +2 more sources

Impact of parity violation on quantum entanglement and Bell nonlocality

open access: yesEuropean Physical Journal C: Particles and Fields
We present our new findings on how various fundamental interactions decisively shape quantum entanglement and the Bell measure within and beyond the quantum field theory (QFT). In QFT, parity symmetry plays a key role in determining entanglement.
Yong Du   +3 more
doaj   +1 more source

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