Quantum correlations between two non-interacting atoms under the influence of a thermal environment |
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| Authors: | Hu Yao-Hua and Wang Jun-Qiang |
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| Affiliation: | College of Physics and Electronic Information, Luoyang Normal University, Luoyang 471022, China |
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| Abstract: | By considering a double Jaynes-Cummings model, we investigate the dynamics of quantum correlations, such as the quantum discord and the entanglement, for two atoms in their respective noisy environments, and study the effect of the purity and the cavity temperature on the quantum correlations. The results show that the entanglement suffers sudden death and revival, however the quantum discord can still reveal the quantum correlations between the two atoms in the region where the entanglement is zero. Moreover, when the temperature of each cavity is high the entanglement dies out in a short time, but the quantum discord still survives for quite a long time. It means that the quantum discord is more resistant to environmental disturbance than the entanglement at higher temperatures. |
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| Keywords: | quantum discord entanglement double Jaynes-Cummings model |
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