Regular Article - Theoretical Physics
Equilibrium and nonequilibrium quantum correlations between two detectors in curved spacetime
College of Physics, Jilin University, 130021, Changchun, China
2 State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, 130021, Changchun, China
3 Department of Chemistry and of Physics and Astronomy, Stony Brook University, 11794-3400, Stony Brook, NY, USA
Accepted: 24 May 2022
Published online: 23 June 2022
We investigate the equilibrium and nonequilibrium quantum information correlations encoded in a two-qubit system in curved spacetime near the horizon of a Kerr black hole. We study the impact of mass and the angular momentum and further the local curvature or accelerations on the behaviors of the quantum correlations between the two qubits. We show that the quantum information of the two qubits is encoded in the spacetime structure. Concretely, the quantum correlations in the two-qubit system vary non-monotonically with the mass of the black hole and are amplified by the angular momentum, while the curvature suppresses the quantum correlations in the system. We show that the nonequilibrium can also contribute to the quantum correlations. Remarkably, the nonequilibrium can lead to the increase of quantum correlations in the steady state under the curved spacetime shown in this black hole example.
© The Author(s) 2022
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