中国物理B ›› 2017, Vol. 26 ›› Issue (3): 37105-037105.doi: 10.1088/1674-1056/26/3/037105

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Vibration-assisted coherent excitation energy transfer in a detuned dimer

Xin Wang(王信), Hao Chen(陈浩), Chen-yu Li(李晨宇), Hong-rong Li(李宏荣)   

  1. 1 School of Science, Xi'an Jiaotong University, Xi'an 710049, China;
    2 CEMS, RIKEN, Wako-shi, Saitama 351-0198, Japan
  • 收稿日期:2016-08-05 修回日期:2016-11-21 出版日期:2017-03-05 发布日期:2017-03-05
  • 通讯作者: Hong-rong Li E-mail:hrli@mail.xjtu.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant No. 11174233).

Vibration-assisted coherent excitation energy transfer in a detuned dimer

Xin Wang(王信)1,2, Hao Chen(陈浩)1, Chen-yu Li(李晨宇)1, Hong-rong Li(李宏荣)1,2   

  1. 1 School of Science, Xi'an Jiaotong University, Xi'an 710049, China;
    2 CEMS, RIKEN, Wako-shi, Saitama 351-0198, Japan
  • Received:2016-08-05 Revised:2016-11-21 Online:2017-03-05 Published:2017-03-05
  • Contact: Hong-rong Li E-mail:hrli@mail.xjtu.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant No. 11174233).

摘要:

The important role of high-energy intramolecular vibrational modes for excitation energy transfer in the detuned photosynthetic systems is studied. Based on a basic dimer model which consists of two two-level systems (pigments) coupled to high-energy vibrational modes, we find that the high-energy intramolecular vibrational modes can enhance the energy transfer with new coherent transfer channels being opened when the phonon energy matches the detuning between the two pigments. As a result, the energy can be effectively transferred into the acceptor. The effective Hamiltonian is obtained to reveal the strong coherent energy exchange among the donor, the acceptor, and the high-energy intramolecular. A semi-classical explanation of the phonon-assisted mechanism is also shown.

关键词: excitation energy transfer, high-energy intramolecular vibrational motion, dynamically resonant coherent transfer

Abstract:

The important role of high-energy intramolecular vibrational modes for excitation energy transfer in the detuned photosynthetic systems is studied. Based on a basic dimer model which consists of two two-level systems (pigments) coupled to high-energy vibrational modes, we find that the high-energy intramolecular vibrational modes can enhance the energy transfer with new coherent transfer channels being opened when the phonon energy matches the detuning between the two pigments. As a result, the energy can be effectively transferred into the acceptor. The effective Hamiltonian is obtained to reveal the strong coherent energy exchange among the donor, the acceptor, and the high-energy intramolecular. A semi-classical explanation of the phonon-assisted mechanism is also shown.

Key words: excitation energy transfer, high-energy intramolecular vibrational motion, dynamically resonant coherent transfer

中图分类号:  (Excitons and related phenomena)

  • 71.35.-y
03.65.Yz (Decoherence; open systems; quantum statistical methods) 63.50.-x (Vibrational states in disordered systems)