https://doi.org/10.1140/epjc/s10052-024-13034-8
Regular Article - Theoretical Physics
Quantumness of gravitational cat states in correlated dephasing channels
1
Faculty of Physics, Semnan University, P.O. Box 35195-363, Semnan, Iran
2
Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University in Torun, ul. Grudziadzka 5, 87-100, Toruń, Poland
3
Single Photon Applications Laboratory, National Laboratory of Atomic, Molecular and Optical Physics, Toruń, Poland
Received:
19
April
2024
Accepted:
16
June
2024
Published online:
6
July
2024
We study the quantumness of gravitational cat states in correlated dephasing channels. Our focus is on exploring how classical correlations between successive actions of a dephasing channel influence the decoherence of two gravitational cats (two qubits) at a thermal regime. The results show that the quantum coherence, local quantum Fisher information, and Bell non-locality can be significantly enhanced by augmenting classical correlations throughout the entire duration when the two qubits pass the channel. However, the gravitational interaction and energy gap between states exhibit intricate impacts on the quantum characteristics of gravitational cats. New features are reported that can be significant for both gravitational physics and quantum information processing.
© The Author(s) 2024
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