From large deviations to Wasserstein gradient flows in multiple dimensions
- Erbar, Matthias
- Maas, Jan
- Renger, D. R. Michiel
2010 Mathematics Subject Classification
- 35A15 35Q84 46N55 60F10
- large deviations, gradient flows, Wasserstein calculus, Gamma convergence
We study the large deviation rate functional for the empirical distribution of independent Brownian particles with drift. In one dimension, it has been shown by Adams, Dirr, Peletier and Zimmer [ADPZ11] that this functional is asymptotically equivalent (in the sense of Gamma-convergence) to the Jordan-Kinderlehrer-Otto functional arising in the Wasserstein gradient flow structure of the Fokker-Planck equation. In higher dimensions, part of this statement (the lower bound) has been recently proved by Duong, Laschos and Renger, but the upper bound remained open, since the proof in [DLR13] relies on regularity properties of optimal transport maps that are restricted to one dimension. In this note we present a new proof of the upper bound, thereby generalising the result of [ADPZ11] to arbitrary dimensions.
- Electron. Comm. Probab., 20 (2015) pp. 1--12.