Dynamics of the Davydov D-squared Ansatz with off-diagonal coupling

Dynamics of the Davydov D-squared Ansatz with off-diagonal coupling

Following the Dirac-Frenkel time-dependent variational principle, dynamics of a one-dimensional Holstein polaron with off-diagonal exciton-phonon coupling is probed by employing the Davy dov D2 Ansatz with two sets of variational parameters,one for each constituting particle in the exciton-phonon sy...

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Bibliographic Details
Main Authors: Zhao, Yang, Luo, Bin, Ye, Jun
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2011
Subjects:
DRNTU::Science::Physics::Atomic physics::Solid state physics
Online Access:https://hdl.handle.net/10356/93836
http://hdl.handle.net/10220/6784
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Institution: Nanyang Technological University
Language: English
Description
Summary:Following the Dirac-Frenkel time-dependent variational principle, dynamics of a one-dimensional Holstein polaron with off-diagonal exciton-phonon coupling is probed by employing the Davy dov D2 Ansatz with two sets of variational parameters,one for each constituting particle in the exciton-phonon system. A close examination of variational outputs from the two trial states reveals fine details of the polar on 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.

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