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Advances of Quantum Key Distribution and Network Nonlocality [PDF]

open access: yesEntropy
In recent years, quantum network technology has been rapidly developing, with new theories, solutions, and protocols constantly emerging. The breakthrough experiments and achievements are impressive, such as the construction and operation of ultra-long ...
Minming Geng
doaj   +2 more sources

Nonlocality in sequential correlation scenarios [PDF]

open access: yesNew Journal of Physics, 2014
As first shown by Popescu (1995 Phys. Rev. Lett. 74 2619), some quantum states only reveal their nonlocality when subjected to a sequence of measurements while giving rise to local correlations in standard Bell tests.
Rodrigo Gallego   +4 more
doaj   +3 more sources

Strong quantum nonlocality without entanglement in every (n−1)-partition [PDF]

open access: yesiScience
Summary: The orthogonal product set with quantum nonlocality can enhance the confidentiality of information without consuming entanglement resources. The confidentiality increases with the reinforcement of its nonlocality. However, the orthogonal product
Huaqi Zhou, Ting Gao, Fengli Yan
doaj   +2 more sources

Optical branched flow in nonlocal nonlinear medium [PDF]

open access: yesNanophotonics
When light propagates through a randomly correlated, slowly varying medium, it generates optical branched flow. Previous studies have demonstrated that the self-focusing effect in optical media can accelerate the appearance of the first branching points ...
Zhao Tongxun   +4 more
doaj   +2 more sources

Nonlocality activation in a photonic quantum network [PDF]

open access: yesNature Communications
Bell nonlocality refers to correlations between two distant, entangled particles that challenge classical notions of local causality. Beyond its foundational significance, nonlocality is crucial for device-independent technologies like quantum key ...
Luis Villegas-Aguilar   +11 more
doaj   +2 more sources

Genuine hidden nonlocality without entanglement: from the perspective of local discrimination

open access: yesNew Journal of Physics, 2022
Quantum nonlocality without entanglement is a fantastic phenomenon in quantum theory. This kind of quantum nonlocality is based on the task of local discrimination of quantum states. Recently, Bandyopadhyay and Halder (2021 Phys. Rev.
Mao-Sheng Li, Zhu-Jun Zheng
doaj   +1 more source

Optimal and tight Bell inequalities for state-independent contextuality sets

open access: yesPhysical Review Research, 2023
Two fundamental quantum resources, nonlocality and contextuality, can be connected through Bell inequalities that are violated by state-independent contextuality (SI-C) sets.
Junior R. Gonzales-Ureta   +2 more
doaj   +1 more source

Certification of non-classicality in all links of a photonic star network without assuming quantum mechanics

open access: yesNature Communications, 2023
Networks composed of independent sources of entangled particles that connect distant users are a rapidly developing quantum technology and an increasingly promising test-bed for fundamental physics.
Ning-Ning Wang   +8 more
doaj   +1 more source

Nonlocality of scale-dependent eddy mixing at the Kuroshio Extension

open access: yesFrontiers in Marine Science, 2023
Although eddy parameterization schemes are often based on the local assumption, previous studies indicate that the nonlocality of total eddy mixing is prevalent at the Kuroshio Extension (KE).
Mingyue Liu   +4 more
doaj   +1 more source

Operational Significance of the Quantum Resource Theory of Buscemi Nonlocality

open access: yesPRX Quantum, 2021
Although entanglement is necessary for observing nonlocality in a Bell experiment, there are entangled states that can never be used to demonstrate nonlocal correlations. In a seminal paper Buscemi [Phys. Rev. Lett.
Patryk Lipka-Bartosik   +3 more
doaj   +1 more source

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