Quantifying the entanglement of quantum channel

Zhou, Huaqi; Gao, Ting; Yan, Fei

doi:10.1103/physrevresearch.4.013200

Cited by 5 publications

(2 citation statements)

References 47 publications

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“…Quantum coherence [21][22][23][24], as a key aspect of quantum physics, is not only an embodiment of the superposition principle of states but also the basis of many unique phenomena in quantum physics, such as quantum entanglement and steering. With the help of quantum coherence, one can implement various quantum information processing tasks which cannot be accomplished classically, such as quantum computing [25,26], quantum information storage [27,28], quantum communication [29,30], and quantum metrology [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Generation of quantum coherence for continuous variables between causally disconnected regions in dilaton spacetime

et al. 2022

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We study the dynamics of Gaussian quantum coherence under the background of a Garfinkle–Horowitz–Strominger dilaton black hole. It is shown that the dilaton field has evident effects on the degree of coherence for all the bipartite subsystems. The bipartite Gaussian coherence is not affected by the frequency of the scalar field for an uncharged or an extreme dilaton black hole. It is found that the initial coherence is not completely destroyed even for an extreme dilaton black hole, which is quite different from the behavior of quantum steering because the latter suffers from a “sudden death” under the same conditions. This is nontrivial because one can employ quantum coherence as a resource for quantum information processing tasks even if quantum correlations have been destroyed by the strong gravitational field. In addition, it is demonstrated that the generation of quantum coherence between the initial separable modes is easier for low-frequency scalar fields. At the same time, quantum coherence is smoothly generated betweenone pair of partners and exhibits a “sudden birth” behavior between another pairs in the curved spacetime.

show abstract

Section: Introductionmentioning

confidence: 99%

Generation of quantum coherence for continuous variables between causally disconnected regions in dilaton spacetime

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Quantum coherence [21][22][23][24], as a key aspect of quantum physics, is not only an embodiment of the superposition principle of states but also the basis of many unique phenomena in quantum physics, such as quantum entanglement and steering. With the help of quantum coherence, one can implement various quantum information processing tasks which cannot be accomplished classically, such as quantum computing [25,26], quantum information storage [27,28] , quantum communication [29,30], and quantum metrology [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Generation of quantum coherence for continuous variables between causally disconnected regions in dilaton spacetime

Xiao,

Wen,

Jing

et al. 2022

Preprint

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We study the dynamics of Gaussian quantum coherence under the background of a Garfinkle-Horowitz-Strominger dilaton black hole. It is shown that the dilaton field has evident effects on the degree of coherence for all the bipartite subsystems. The bipartite Gaussian coherence is not affected by the frequency of the scalar field for an uncharged or an extreme dilaton black hole. It is found that the initial coherence is not completely destroyed even for an extreme dilaton black hole, which is quite different from the behavior of quantum steering because the latter suffers from a"sudden death" under the same conditions. This is nontrivial because one can employ quantum coherence as a resource for quantum information processing tasks even if quantum correlations have been destroyed by the strong gravitational field. In addition, it is demonstrated that the generation of quantum coherence between the initial separable modes is easier for low-frequency scalar fields. At the same time, quantum coherence is smoothly generated betweenone pair of partners and exhibits a "sudden birth" behavior between another pairs in the curved spacetime.

show abstract

Imaginarity of quantum channels: Refinement and alternative

Chen,

Lei

2025

Physics Letters A

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Quantifying the entanglement of quantum channel

Cited by 5 publications

References 47 publications

Generation of quantum coherence for continuous variables between causally disconnected regions in dilaton spacetime

Generation of quantum coherence for continuous variables between causally disconnected regions in dilaton spacetime

Generation of quantum coherence for continuous variables between causally disconnected regions in dilaton spacetime

Imaginarity of quantum channels: Refinement and alternative

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