Accelerated convergence to equilibrium and reduced asymptotic variance for Langevin dynamics using Stratonovich perturbations
File(s)1903.03024.pdf (424.88 KB)
Accepted version
Author(s)
Abdulle, A
Pavliotis, GA
Vilmart, G
Type
Journal Article
Abstract
In this paper, we propose a new approach for sampling from probability measures in, possibly, high-dimensional spaces. By perturbing the standard overdamped Langevin dynamics by a suitable Stratonovich perturbation that preserves the invariant measure of the original system, we show that accelerated convergence to equilibrium and reduced asymptotic variance can be achieved, leading, thus, to a computationally advantageous sampling algorithm. The new perturbed Langevin dynamics is reversible with respect to the target probability measure and, consequently, does not suffer from the drawbacks of the nonreversible Langevin samplers that were introduced in C.-R. Hwang et al. (1993)[1]and studied in, e.g., T. Lelièvre et al. (2013)[2]and A.B. Duncan et al. (2016)[3], while retaining all of their advantages in terms of accelerated convergence and reduced asymptotic variance. In particular, the reversibility of the dynamics ensures that there is no oscillatory transient behaviour. The improved performance of the proposed methodology, in comparison to the standard overdamped Langevin dynamics and its nonreversible perturbation, is illustrated on an example of sampling from a two-dimensional warped Gaussian target distribution.
Date Issued
2019-04-24
Date Acceptance
2019-04-19
Citation
Comptes Rendus Mathematique (Academie des Sciences), 2019, 357 (4), pp.349-354
ISSN
0764-4442
Publisher
Elsevier
Start Page
349
End Page
354
Journal / Book Title
Comptes Rendus Mathematique (Academie des Sciences)
Volume
357
Issue
4
Copyright Statement
Crown Copyright © 2019 Published by Elsevier Masson SAS on behalf of Académie des sciences. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/
Subjects
Science & Technology
Physical Sciences
Mathematics
REDUCTION
0101 Pure Mathematics
General Mathematics
Publication Status
Published
Date Publish Online
2019-04-24