Long-distance quantum transport dynamics in macromolecules

被引:4
|
作者
Schneider, E. [1 ]
Faccioli, P.
机构
[1] Univ Trento, Dept Phys, Povo, Italy
来源
PHYSICAL REVIEW B | 2014年 / 89卷 / 13期
关键词
THIN-FILM TRANSISTORS; BROWNIAN-MOTION; COHERENCE; DNA; SYSTEMS;
D O I
10.1103/PhysRevB.89.134305
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Using renormalization group methods, we develop a rigorous coarse-grained representation of the dissipative dynamics of quantum excitations propagating inside open macromolecular systems. We show that, at very low spatial resolution, this quantum transport theory reduces to a modified Brownian process, in which quantum delocalization effects are accounted for by means of an effective term in the Onsager-Machlup functional. Using this formulation, we derive a simple analytic solution for the time-dependent probability of observing the quantum excitation at a given point in the macromolecule. This formula can be used to predict the migration of natural or charged quantum excitations in a variety of molecular systems, including biological and organic polymers, organic crystalline transistors, or photosynthetic complexes. For illustration purposes, we apply this method to investigate inelastic electronic hole transport in a long homo-DNA chain.
引用
收藏
页数:13
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