Communications in Theoretical Physics ›› 2016, Vol. 65 ›› Issue (01): 114-120.

• Interdisciplinary Physics and Related Areas of Science and Technology • Previous Articles     Next Articles

Decoherence-and Dimerization-assisted Energy Transport in Protomer of Light-Harvesting Complexes

Yun-Qing Zhou1,2, You-Quan Li2   

  1. 1 Department of Physics and Key Laboratory of Oceanographic Big Data Mining & Application of Zhejiang Province, Zhejiang Ocean University, Zhoushan 316000, China;
    2 Zhejiang Institute of Modern Physics and Department of Physics, Zhejiang University, Hangzhou 310027, China
  • Received: 2015-08-25 Revised: 2015-10-26 Published: 2016-01-01
  • Contact: Yun-Qing Zhou E-mail:yqchou@163.com
  • Funding Information: 

    Supported by the National Natural Science Foundation of China under Grant Nos.11274272,11304281,31201001,and by the Natural Science Foundation of Zhejiang Province under Grant Nos.Y6110250,LY14A040001 and Zhejiang Ocean University(X12ZD10)

Abstract: We have investigated the dynamics of a protomer coupled to two different decoherent environments,each in a configuration called the spin star configuration.Using the quantum mechanics method,in different situations,we obtain the analytical expressions for the transition probability in the protomer system.In thermal equilibrium,there exist well-defined ranges of parameters for which decoherent interaction between the protomer and the environment assists energy transfer in the protomer system,while in pure quantum mechanics states,the decoherent interaction assists energy transfer for an eigenstate but against energy transfer for quantum mechanics averages.In particular,we also find that the dimerization of two bacteriochlorophylls in protomer can always assist energy transfer in certain parameter range,and in the appropriate spin bath energy,the efficiency of energy transport is sensitively depended on the temperature of environments.

Key words: decoherence assisted, energy transport, light-harvesting complexes, protomer

PACS numbers: 

  • 82.20.Rp