Coherent excitation-energy transfer and quantum entanglement in a dimer

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	Coherent excitation-energy transfer and quantum entanglement in a dimer
	Liao, Jie-Qiao; Huang, Jin-Feng; Kuang, Le-Man; Sun, C. P.; Liao, JQ , Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
刊名	PHYSICAL REVIEW A
	2010
卷号	82 期号:5 页码:-
关键词	Sudden-death Photosynthesis Environment State
ISSN号	1050-2947
英文摘要	We study coherent energy transfer of a single excitation and quantum entanglement in a dimer, which consists of a donor and an acceptor modeled by two two-level systems. Between the donor and the acceptor, there exists a dipole-dipole interaction, which provides the physical mechanism for coherent energy transfer and entanglement generation. The donor and the acceptor couple to two independent heat baths with diagonal couplings that do not dissipate the energy of the noncoupling dimer. Special attention is paid to the effect on single-excitation energy transfer and entanglement generation of the energy detuning between the donor and the acceptor and the temperatures of the two heat baths. It is found that, the probability for single-excitation energy transfer largely depends on the energy detuning in the low temperature limit. Concretely, the positive and negative energy detunings can increase and decrease the probability at steady state, respectively. In the high temperature limit, however, the effect of the energy detuning on the probability is negligibly small. We also find that the probability is negligibly dependent on the bath temperature difference of the two heat baths. In addition, it is found that quantum entanglement can be generated in the process of coherent energy transfer. As the bath temperature increases, the generated steady-state entanglement decreases. For a given bath temperature, the steady-state entanglement decreases with the increase of the absolute value of the energy detuning.
学科主题	Physics
URL标识	查看原文
WOS记录号	WOS:000284044500001
公开日期	2012-08-02
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/5011]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Liao, JQ , Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Liao, Jie-Qiao,Huang, Jin-Feng,Kuang, Le-Man,et al. Coherent excitation-energy transfer and quantum entanglement in a dimer[J]. PHYSICAL REVIEW A,2010,82(5):-.
APA	Liao, Jie-Qiao,Huang, Jin-Feng,Kuang, Le-Man,Sun, C. P.,&Liao, JQ , Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China.(2010).Coherent excitation-energy transfer and quantum entanglement in a dimer.PHYSICAL REVIEW A,82(5),-.
MLA	Liao, Jie-Qiao,et al."Coherent excitation-energy transfer and quantum entanglement in a dimer".PHYSICAL REVIEW A 82.5(2010):-.