Efficiency of energy transfer in a light-harvesting system under quantum coherence

被引：264

作者：

Olaya-Castro, Alexandra ^{[1
]}

Lee, Chiu Fan ^{[1
]}

Fassioli Olsen, Francesca ^{[1
]}

Johnson, Neil F. ^{[2
]}

机构：

[1] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England

[2] Univ Miami, Dept Phys, Miami, FL 33126 USA

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.78.085115

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the role of quantum coherence in the efficiency of excitation transfer in a ring-hub arrangement of interacting two-level systems, mimicking a light-harvesting antenna connected to a reaction center as it is found in natural photosynthetic systems. By using a quantum jump approach, we demonstrate that in the presence of quantum coherent energy transfer and energetic disorder, the efficiency of excitation transfer from the antenna to the reaction center depends intimately on the quantum superposition properties of the initial state. In particular, we find that efficiency is sensitive to symmetric and asymmetric superposition of states in the basis of localized excitations, indicating that initial-state properties can be used as an efficiency control parameter at low temperatures.

引用

页数：7

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