Hi Everyone,
Immediately following the ITAMP seminar being presented this Friday by
Professor Mark Tuckerman, our own Dr. Takatoshi Fujita will present his
current work in excitonics. We will meet in the Division Room as soon as
possible after Professor Tuckerman's talk (so probably around 3:05). A
title and abstract for group meeting is included below.
Title: Dynamics of an exciton coupled to a classical phonon bath
Abstract:
In this talk, I will discuss dynamics of an exciton system coupled to a
classical phonon bath and a relationship between atomistic and stochastic
bath models.
If the phonon bath is treated classically, dynamics of the exciton and
phonon systems are described by the Ehrenfest equations.
I will show by introducing Mori's projection operator technique that
stochastic bath models can be regarded as an approximation of the Ehrenfest
equations. Deficiencies of stochastic models can be explained by the
derivation. Then, I will propose an idea to include reorganization effects
into the stochastic model and apply it to study Stokes shifts in model
J-aggregates. Finally, I will describe possible idea to correct quantum
effects of the phonon bath.
--
Ryan Babbush | PhD Student in Physics
(949) 331-3943 | babbush(a)fas.harvard.edu
Harvard University | Aspuru-Guzik Group
12 Oxford Street | Cambridge, MA 02138
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