Constructing auxiliary dynamics for nonequilibrium stationary states by variance minimization
Abstract
We present a strategy to construct guiding distribution functions (GDFs) based on variance minimization. Auxiliary dynamics via GDFs mitigates the exponential growth of variance as a function of bias in Monte Carlo estimators of large deviation functions. The variance minimization technique exploits the exact properties of eigenstates of the tilted operator that defines the biased dynamics in the nonequilibrium system. We demonstrate our techniques in two classes of problems. In the continuum, we show that GDFs can be optimized to study the interacting driven diffusive systems where the efficiency is systematically improved by incorporating higher correlations into the GDF. On the lattice, we use a correlator product state ansatz to study the 1D weakly asymmetric simple exclusion process. We show that with modest resources, we can capture the features of the susceptibility in large systems that mark the phase transition from uniform transport to a traveling wave state. Our work extends the repertoire of tools available to study nonequilibrium properties in realistic systems.
- Authors:
-
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- Publication Date:
- Research Org.:
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1803263
- Alternate Identifier(s):
- OSTI ID: 1604237
- Grant/Contract Number:
- SC0018140
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Chemical Physics
- Additional Journal Information:
- Journal Volume: 152; Journal Issue: 10; Journal ID: ISSN 0021-9606
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Chemistry; Physics
Citation Formats
Ray, Ushnish, and Kin-Lic Chan, Garnet. Constructing auxiliary dynamics for nonequilibrium stationary states by variance minimization. United States: N. p., 2020.
Web. doi:10.1063/1.5143144.
Ray, Ushnish, & Kin-Lic Chan, Garnet. Constructing auxiliary dynamics for nonequilibrium stationary states by variance minimization. United States. https://doi.org/10.1063/1.5143144
Ray, Ushnish, and Kin-Lic Chan, Garnet. Thu .
"Constructing auxiliary dynamics for nonequilibrium stationary states by variance minimization". United States. https://doi.org/10.1063/1.5143144. https://www.osti.gov/servlets/purl/1803263.
@article{osti_1803263,
title = {Constructing auxiliary dynamics for nonequilibrium stationary states by variance minimization},
author = {Ray, Ushnish and Kin-Lic Chan, Garnet},
abstractNote = {We present a strategy to construct guiding distribution functions (GDFs) based on variance minimization. Auxiliary dynamics via GDFs mitigates the exponential growth of variance as a function of bias in Monte Carlo estimators of large deviation functions. The variance minimization technique exploits the exact properties of eigenstates of the tilted operator that defines the biased dynamics in the nonequilibrium system. We demonstrate our techniques in two classes of problems. In the continuum, we show that GDFs can be optimized to study the interacting driven diffusive systems where the efficiency is systematically improved by incorporating higher correlations into the GDF. On the lattice, we use a correlator product state ansatz to study the 1D weakly asymmetric simple exclusion process. We show that with modest resources, we can capture the features of the susceptibility in large systems that mark the phase transition from uniform transport to a traveling wave state. Our work extends the repertoire of tools available to study nonequilibrium properties in realistic systems.},
doi = {10.1063/1.5143144},
journal = {Journal of Chemical Physics},
number = 10,
volume = 152,
place = {United States},
year = {Thu Mar 12 00:00:00 EDT 2020},
month = {Thu Mar 12 00:00:00 EDT 2020}
}
Web of Science
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