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论文类型：期刊论文

发表时间：2009-06-01

发表刊物：PHYSICAL REVIEW A

收录刊物：SCIE、EI、Scopus

卷号：79

期号：6

ISSN号：1050-2947

关键字：excited states; optical pumping; quantum entanglement; quantum optics

摘要：We study spontaneously generated entanglement (SGE) between two identical multilevel atoms in free space via vacuum-induced radiative coupling. We show that the SGE in two-atom systems may initially increase with time but eventually vanishes in the time scale determined by the excited-state lifetime and radiative coupling strength between the two atoms. We demonstrate that steady-state SGE can be established by incoherently pumping the atoms to their excited states. We have shown that an appropriate rate of incoherent pump can help in producing optimal steady-state SGE. The multilevel systems offer us more channels to establish entanglement. The system under consideration can be realized in a tight trap or atoms/ions doped in a solid substrate.