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- Title
Using Perturbed Underdamped Langevin Dynamics to Efficiently Sample from Probability Distributions.
- Authors
Duncan, A.; Nüsken, N.; Pavliotis, G.
- Abstract
In this paper we introduce and analyse Langevin samplers that consist of perturbations of the standard underdamped Langevin dynamics. The perturbed dynamics is such that its invariant measure is the same as that of the unperturbed dynamics. We show that appropriate choices of the perturbations can lead to samplers that have improved properties, at least in terms of reducing the asymptotic variance. We present a detailed analysis of the new Langevin sampler for Gaussian target distributions. Our theoretical results are supported by numerical experiments with non-Gaussian target measures.
- Subjects
QUANTUM perturbations; LANGEVIN equations; DISTRIBUTION (Probability theory); INVARIANT measures; ASYMPTOTIC distribution
- Publication
Journal of Statistical Physics, 2017, Vol 169, Issue 6, p1098
- ISSN
0022-4715
- Publication type
Article
- DOI
10.1007/s10955-017-1906-8