Results 51 to 60 of about 19,947 (210)
Exposure of subtle multipartite quantum nonlocality
npj Quantum Information, 2021 The celebrated Einstein–Podolsky–Rosen quantum steering has a complex structure in the multipartite scenario. We show that a naively defined criterion for multipartite steering allows, like in Bell nonlocality, for a contradictory effect whereby local ...
M. M. Taddei +5 more
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Zeitschrift für Naturforschung A, 2001 Abstract It is shown that all quantum “contradictions” disappear if one drops the assumption of unique initial conditions for a hidden variable theory for individual quantum processes. Our proposal corresponds with a deterministic world evolution such that local physical conditions are nonreproducible, in agreement with empirical ...
W. De Baere, J. De Neve
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NONLOCAL EFFECTS IN QUANTUM GRAVITY [PDF]
Modern Physics Letters A, 1998 Recently,2 a new quantum gravity theory was presented in which the quantum effects were represented by the conformal degree of freedom of the space–time metric. In this letter we show that in the framework of this theory, quantum gravity is nonlocal.
Shojai, Ali +2 more
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Advanced Science, EarlyView.Direct orbital angular momentum (OAM) detection through the orbital photogalvanic effect offers a scalable route for integrated optoelectronics. This perspective evaluates symmetry‐driven material selection and demonstrates how electrode matrices enable the resolution of complex, mixed OAM modes.
Jinluo Cheng +5 more
wiley +1 more source
Entanglement and nonlocality are inequivalent for any number of particles [PDF]
, 2014 Understanding the relation between nonlocality and entanglement is one of the fundamental problems in quantum physics. In the bipartite case, it is known that the correlations observed for some entangled quantum states can be explained within the ...
Acín, A. +3 more
core +3 more sources
Lifshitz Transition in Correlated Topological Semimetals
Advanced Science, EarlyView.Theoretical calculations reveal that in YPtBi and GdPtBi, strong electronic correlations shift topological Dirac nodes away from the Fermi level by forming large hole pockets. This effect is sensitive to temperature and arises from interactions among 4d or 4f electrons, offering insights into Fermi surface engineering in quantum materials.
Byungkyun Kang +4 more
wiley +1 more source
Causality and Nonlocality as Axioms for Quantum Mechanics [PDF]
, 1997 Quantum mechanics permits nonlocality - both nonlocal correlations and nonlocal equations of motion - while respecting relativistic causality. Is quantum mechanics the unique theory that reconciles nonlocality and causality? We consider two models, going
Popescu, Sandu, Rohrlich, Daniel
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Joint Measurability, Einstein-Podolsky-Rosen Steering, and Bell Nonlocality
, 2014 We investigate the relation between the incompatibility of quantum measurements and quantum nonlocality. We show that any set of measurements that is not jointly measurable (i.e. incompatible) can be used for demonstrating EPR steering, a form of quantum
Brunner, Nicolas +2 more
core +2 more sources
Equilibrium Propagation for Dissipative Dynamics
Advanced Intelligent Systems, EarlyView.This work develops local learning rules for damped linear dynamical systems, including mechanical structures and resistor‐inductor‐capacitor (RLC) circuits, by leveraging an effective action formulation. It demonstrates how physical systems can autonomously compute gradients and learn temporal patterns, enabling applications such as sound ...
Marc Berneman, Daniel Hexner
wiley +1 more source
Hierarchical relationship of nonlocal correlations in Schwarzschild-de Sitter spacetime
European Physical Journal C: Particles and FieldsWe investigate the hierarchy of nonlocal correlations for Dirac fields in the Schwarzschild de Sitter (SdS) spacetime. We find that the hierarchical relationship between the nonlocal advantage of quantum coherence (NAQC) and Bell nonlocality remains in ...
Huimin Yao +3 more
doaj +1 more source