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题名: Coherent excitation-energy transfer and quantum entanglement in a dimer
作者: Liao, Jie-Qiao ;  Huang, Jin-Feng ;  Kuang, Le-Man ;  Sun, C. P.
刊名: PHYSICAL REVIEW A
出版日期: 2010
卷号: 82, 期号:5, 页码:-
关键词: SUDDEN-DEATH ;  PHOTOSYNTHESIS ;  ENVIRONMENT ;  STATE
学科分类: Physics
通讯作者: Liao, JQ , Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
部门归属: [Liao, JQ; Huang, JF; Sun, CP] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China; [Huang, JF; Kuang, LM] Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Minist Educ, Changsha 410081, Hunan, Peoples R China; [Huang, JF; Kuang, LM] Hunan Normal Univ, Dept Phys, Changsha 410081, Hunan, Peoples R China
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.
资助者: NSFC[10935010, 10775048]; NFRPC[2006CB921205, 2007CB925204]
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000284044500001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5011
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
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):-.
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