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Entanglement and Quantum Discord Dynamics of Two Atoms in a Broadband Squeezed Vacuum Bath |
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| Authors: | Xiang-Ping Liao Jian-Shu Fang Mao-Fa Fang Bin Liu Zhong Huang |
| Institution: | 1. College of Science, Hunan University of Technology, Zhuzhou, Hunan, 412008, China 2. Key Laboratory of Green Packaging and Application of Biological Nanotechnology, Hunan University of Technology, Zhuzhou, Hunan, 412008, China 3. College of Physics and Information Science, Hunan Normal University, Changsha, Hunan, 410081, China |
| Abstract: | We study the dynamics of entanglement and quantum discord between two two-level atoms that interact with a common squeezed reservoir. It is shown that the degree of entanglement and quantum discord are very sensitive to the degree of two-photon correlation for large values of the mean photon number. The squeezed vacuum environment can drive the system to a stationary state with high entanglement and quantum discord for certain X-type states. Furthermore, sudden change happens to the dynamics of quantum discord while the entanglement is remained almost unchanged. |
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