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Quantum dynamics of entanglement and single excitation transfer in LH1-RC-type trimer

ISSN号：0253-6102
期刊名称：Communications in Theoretical Physics
时间：2012.9.9
页码：359-
分类：O413.1[理学—理论物理;理学—物理] TQ630.493[化学工程—精细化工]
作者机构：[1]Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Depart-ment of Physics, Hunan Normal University, Changsha 410081, China
相关基金：Supported by the National Fundamental Research Program under Grant No. 2007CB925204, the National Natural Science Funclatlon under Grant Nos. 10775048 and 11075050, the Program for Changjiang Scholars and Innovative Research Team in University under Grant No. IRT0964, and Hunan Provincial Natural Science Foundation under Grant No. llJJT001
相关项目：量子复杂系统的量子消相干量子纠缠和量子关联研究

关键词：量子纠缠, 量子力学, 三聚体, RC型, 激发, SET, 基本单元, 光合作用, an LHi-RC-type trimer, quantum dynamics, quantum entanglement, single excitation transfer

中文摘要：

In this paper,we study quantum dynamics of entanglement and single excitation transfer(SET) in an LH1-RC-type trimer which can describe a basic unit cell in the LH1-RC complex in the photosynthetic process.It is shown that there exists a sudden change of entanglement at the critic point of quantum phase transition(QPT) of the system at low temperatures,the entanglement sudden change caused by the QPT is suppressed at higher temperatures.We investigate the influence of environment on entanglement and SET.We show the generation of the dephasing-assisted entanglement between a donor and an acceptor and the existence of the steady-state entanglement,and demonstrate the entanglement transfer from donor-donor entanglement to donor-acceptor entanglement in the dynamic evolution.We reveal the close relation between the SET probability and donor-acceptor entanglement.Especially,we find that the SET probability is proportional to the amount of donor-acceptor entanglement under certain conditions.

英文摘要：

In this paper, we study quantum dynamics of entanglement and single excitation transfer （SET） in an LH1-RC-type trimer which can describe a basic unit cell in the LH1-RC complex in the photosynthetic process. It is shown that there exists a sudden change of entanglement at the critic point of quantum phase transition （QPT） of the system at low temperatures, the entanglement sudden change caused by the QPT is suppressed at higher temperatures. We investigate the influence of environment on entanglement and SET. We show the generation of the dephasing-assisted entanglement between a donor and an acceptor and the existence of the steady-state entanglement, and demonstrate the entanglement transfer from donor-donor entanglement to donor-acceptor entanglement in the dynamic evolution. We reveal the close relation between the SET probability and donor-acceptor entanglement. Especially, we find that the SET probability is proportional to the amount of donor-acceptor entanglement under certain conditions.

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