Dynamic path integral methods: A maximum entropy approach based on the combined use of real and imaginary time quantum Monte Carlo data

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A new numerical procedure for the study of finite temperature quantum dynamics is developed. The method is based on the observation that the real and imaginary time dynamical data contain complementary types of information. Maximum entropy methods, based on a combination of real and imaginary time input data, are used to calculate the spectral densities associated with real time correlation functions. Model studies demonstrate that the inclusion of even modest amounts of short-time real time data significantly improves the quality of the resulting spectral densities over that achievable using either real time data or imaginary time data separately. (C) 1998 American Institute of Physics. [S0021-9606(98)51010-0].
Publisher
AMER INST PHYSICS
Issue Date
1998-03
Language
ENG
Article Type
Article
Keywords

SIMULATIONS; SYSTEMS

Citation

JOURNAL OF CHEMICAL PHYSICS, v.108, no.10, pp.3871 - 3875

ISSN
0021-9606
DOI
10.1063/1.475790
URI
http://hdl.handle.net/10203/73161
Appears in Collection
BiS-Journal Papers(저널논문)
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