Entanglement Dynamics of Quantum States Undergoing Decoherence from a Driven Critical Environment |
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| Authors: | MA Xiao-San QIAO Ying LIU Xiao-Dong WANG An-Min |
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| Affiliation: | 1. School of Electric Engineering and Information, Anhui University of Technology, Ma'anshan 243002, China;2. Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China |
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| Abstract: | In this paper, we have investigated the quantum entanglement of quantum states undergoing decoherence from a spin environment which drives a quantum phase transition. From our analysis, we find that the entanglement dynamics depends not only on the coupling strength but also on the external magnetic field and the number of the freedom degrees of the environment. Specially, our results imply that the decay of the entanglement can be enhanced by the quantum phase transition of the environment when the system is coupled to the environment weakly. Additionally, the discussion of the case of the multipartite states with high dimensions is made. |
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| Keywords: | quantum entanglement entanglement dynamics quantum phase transition |
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