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Dynamics control of geometric quantum discord for two coupling qubits in a squeezed vacuum reservoir |
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| Authors: | Juju Hu Yinghua Ji Yongmei Liu |
| Institution: | 1. Department of Physics, Jiangxi Normal University, Nanchang, Jiangxi 330022, China;2. Key Laboratory of Photoelectronics and Telecommunication of Jiangxi Province, Nanchang, Jiangxi 330022, China;3. College of Mathematics and Information Science of Jiangxi Normal University, Nanchang, Jiangxi 330022, China |
| Abstract: | We investigate the dynamics of geometric quantum discord of coupled qubits in a squeezed vacuum reservoir. The results show that there is distinct difference between the dynamics of geometric quantum discord and that of quantum entanglement near (or away from) the decoherence free subspace. We also find that the squeezed vacuum reservoir with high squeezed amplitude is more suitable for geometric quantum discord to survive. The robustness of geometric quantum discord is stronger than that of quantum entanglement. |
| Keywords: | Quantum correlation Coupled qubits Geometric quantum discord Concurrence |
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