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论文类型： 期刊论文

发表时间： 2014-05-01

发表刊物： CHINESE PHYSICS B

收录刊物： SCIE、EI、ISTIC、Scopus

卷号： 23

期号： 5

ISSN号： 1674-1056

关键字： entanglement; spin-star environment; weakly coupled system

摘要： We study the entanglement evolution in a weakly coupled bipartite system with a large energy level difference under the influence of spin-star environments. The subsystems can be coupled to a pure state or a thermal equilibrium state spin-star environment. Our results show that, in the case of the coupling strength being less than the energy level difference of the subsystems (weakly coupled), the spin-star environment can always be used to assist the entanglement generation of the bipartite system.