https://doi.org/10.1140/epjd/s10053-023-00733-2
Regular Article – Quantum Optics
Classical and quantum correlations in a system of two atoms interacting with the Schrödinger cat state field
1
College of Physics and Electronic Information, Inner Mongolia Normal University, 011517, Inner Mongolia, Hohhot, China
2
Library, Inner Mongolia Normal University, 010022, Inner Mongolia, Hohhot, China
3
Pioneer College, Inner Mongolia University, 010070, Inner Mongolia, Hohhot, China
Received:
19
January
2023
Accepted:
16
July
2023
Published online:
30
July
2023
In this study, we investigate the correlations between the atoms in a system of two atoms interacting with the Schrödinger cat state field. We examine the impact of various parameters, such as atomic and field factors, on the evolution of both classical and quantum correlations between the atoms, which are initially in six different states. The results indicate that there may be sudden changes in both quantum and classical correlations under certain conditions, and the quantum correlation measured by quantum discord (QD) and geometrical quantum discord (GQD) and the classical correlation (CC) exist within certain domains of scale time without entanglement (by concurrence C), and also, the phenomena of the collapse and revival can be observed for the above four quantities. Compared the evolution behavior of quantum correlation (C, QD, GQD) with that of classical correlation (CC), it will be seen that the time evolution curves of C, QD and GQD are obviously different from that of CC in the mentioned cases.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
