Abstract
We present a new approach to prove the macroscopic hydrodynamic behaviour for interacting particle systems, and as an example we treat the well-known case of the symmetric simple exclusion process (SSEP). More precisely, we characterize any possible limit of its empirical density measures as solutions to the heat equation by passing to the limit in the gradient flow structure of the particle system.
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Notes
- 1.
This is also the assumption used to make Yau’s relative entropy method work, see [21].
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Acknowledgments
M.F. : I would like to thank Hong Duong, Matthias Erbar, Vaios Laschos and André Schlichting for discussions on convergence of gradient flows. Part of this work was done while I was staying at the Hausdorff Institute for Mathematics in Bonn, whose support is gratefully acknowledged. I also benefited from funding from GDR MOMAS and from NSF FRG grant DMS-1361185. M.S.: This work has been supported by the French Ministry of Education through the grant ANR (EDNHS), and also by CAPES (Brazil) and IMPA (Instituto de Matematica Pura e Aplicada, Rio de Janeiro) through a post-doctoral fellowship.
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Fathi, M., Simon, M. (2016). The Gradient Flow Approach to Hydrodynamic Limits for the Simple Exclusion Process. In: Gonçalves, P., Soares, A. (eds) From Particle Systems to Partial Differential Equations III. Springer Proceedings in Mathematics & Statistics, vol 162. Springer, Cham. https://doi.org/10.1007/978-3-319-32144-8_8
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