Dynamics of a one-dimensional Holstein polaron with the Davydov ansatze

被引：67

作者：

Sun, Jin ^{[1
]}

Luo, Bin ^{[1
]}

Zhao, Yang ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 01期

关键词：

ENERGY-BAND THEORY; SELF-TRAPPING PROCESS; VARIATIONAL APPROACH; ANTENNA COMPLEXES; MOLECULAR CHAINS; SOLITON; COHERENCE; QUANTUM; MODEL; SUPERRADIANCE;

D O I：

10.1103/PhysRevB.82.014305

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Following the Dirac-Frenkel time-dependent variational principle, dynamics of a one-dimensional Holstein polaron is probed by employing the Davydov D-2 ansatz with two sets of variational parameters, one for each constituting particle in the exciton-phonon system, and a simplified variant of the Davydov D-1 ansatz, also known as the (D) over tilde ansatz, with an additional set of phonon displacement parameters. A close examination of variational outputs from the two trial states reveals fine details of the polaron structure and intricacies of dynamic exciton-phonon interactions. Superradiance coherence sizes, speeds of exciton-induced phonon wave packets, linear optical absorption, and polaron energy compositions are also included in the study.

引用

页数：14

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