Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Quantum Information Processing

Classifying quantum steering, entanglement, and discord for continuous variables in Schwarzschild spacetime

Shu-Min Wu, Dandan Liu, Xiaowei Fan, Wen-Mei Li, X. L. Huang, Hao‐Sheng Zeng

Published Oct 14, 2023• 2 citations
Publisher
DOI
10.1007/s11128-023-04128-5

Related papers

Quantum steering and quantum discord under noisy channels and entanglement swapping

Pedro Rosário, Andrés F. Ducuara, Cristian E. Susa

arXiv:2112.10027•Physics Letters A•Apr 14, 2022•5 citations

Classifying Directional Gaussian Entanglement, Einstein-Podolsky-Rosen Steering, and Discord

Qiongyi He, Qihuang Gong, M. D. Reid

Using Venn diagrams, we classify the different types of two-mode Gaussian continuous variable quantum correlation including directional entanglement and Einstein-Podolsky-Rosen (EPR) steering. We establish unified signatures for one- and two-way quantum steering, entanglement, and discord beyond entanglement in terms of an EPR-type variance. By focusing on Gaussian states, we link an optimized condition for entanglement based on an EPR variance to the Simon-Peres condition. This allows us to quantify the asymmetry of the Gaussian entanglement, and to relate the asymmetry to a directional quantum teleportation protocol where Alice and Bob possess asymmetrically noisy channels. Our analysis enables a determination of the type and direction of quantum correlation in a way that is easily measured in experiment. We also find that for symmetric states, when discord exceeds a certain threshold, the states are necessarily steerable.

arXiv:1406.6708•Physical Review Letters•Feb 12, 2015•133 citations

Quantum distinguishability and geometric discord in the background of Schwarzschild space–time

Jiadong Shi, Zhiyong Ding, Juan He +7 more

Physica A Statistical Mechanics and its Applications•Jun 23, 2018•12 citations

Tripartite quantum steering in Schwarzschild spacetime

Guang-Wei Mi, Xiaofen Huang, Tinggui Zhang

We investigate the effects of Hawking radiation on quantum steering and steering asymmetry in a tripartite system embedded in Schwarzschild spacetime. All tripartite steering types were classified,comprising three "1 to 2" and three "2 to 1" steering cases. Through a systematic analysis of all physically relevant scenarios (including accessible and inaccessible modes), we classify three canonical scenarios with one, two and three physically accessible modes. In the scenario of three physically accessible modes, Hawking radiation disrupts quantum steering, with the maximum steering asymmetry during the two-way steering to one-way steering transition precisely demarcating the phase boundary between these regimes. For two physically accessible modes, Hawking radiation exhibits dual behavior: enhancing the steering from Alice and Bob to anti-Charlie under certain parameters while suppressing it under others, while net strengthening other steering types. When considering one physically accessible mode, the Hawking effect of the black hole significantly enhances quantum steering. These findings provide new insights into quantum correlations in curved spacetime and establish observable signatures of Hawking effects in quantum steering phenomena.

gr-qcCross-listedarXiv:2602.00991•The European Physical Journal C•Feb 3, 2026•1 citation

Physically accessible and inaccessible quantum correlations of Dirac fields in Schwarzschild spacetime

Samira Elghaayda, Asad Ali, Saif M. Al-Kuwari +1 more

arXiv:2407.05509•Physics Letters A•Sep 19, 2024•25 citations

Entanglement entropy in Schwarzschild spacetime

Yoshinori Matsuo

•Jun 1, 2022•0 citations
Using Venn diagrams, we classify the different types of two-mode Gaussian continuous variable quantum correlation including directional entanglement and Einstein-Podolsky-Rosen (EPR) steering. We establish unified signatures for one- and two-way quantum steering, entanglement, and discord beyond entanglement in terms of an EPR-type variance. By focusing on Gaussian states, we link an optimized condition for entanglement based on an EPR variance to the Simon-Peres condition. This allows us to quantify the asymmetry of the Gaussian entanglement, and to relate the asymmetry to a directional quantum teleportation protocol where Alice and Bob possess asymmetrically noisy channels. Our analysis enables a determination of the type and direction of quantum correlation in a way that is easily measured in experiment. We also find that for symmetric states, when discord exceeds a certain threshold, the states are necessarily steerable.
We investigate the effects of Hawking radiation on quantum steering and steering asymmetry in a tripartite system embedded in Schwarzschild spacetime. All tripartite steering types were classified,comprising three "1 to 2" and three "2 to 1" steering cases. Through a systematic analysis of all physically relevant scenarios (including accessible and inaccessible modes), we classify three canonical scenarios with one, two and three physically accessible modes. In the scenario of three physically accessible modes, Hawking radiation disrupts quantum steering, with the maximum steering asymmetry during the two-way steering to one-way steering transition precisely demarcating the phase boundary between these regimes. For two physically accessible modes, Hawking radiation exhibits dual behavior: enhancing the steering from Alice and Bob to anti-Charlie under certain parameters while suppressing it under others, while net strengthening other steering types. When considering one physically accessible mode, the Hawking effect of the black hole significantly enhances quantum steering. These findings provide new insights into quantum correlations in curved spacetime and establish observable signatures of Hawking effects in quantum steering phenomena.