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Topological sigma models & dissipative hydrodynamics

Haehl, Felix M.; Loganayagam, R.; Rangamani, Mukund

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Felix M. Haehl

R. Loganayagam

Mukund Rangamani


We outline a universal Schwinger-Keldysh effective theory which describes macroscopic thermal fluctuations of a relativistic field theory. The basic ingredients of our construction are three: a doubling of degrees of freedom, an emergent abelian symmetry associated with entropy, and a topological (BRST) supersymmetry imposing fluctuationdissipation theorem. We illustrate these ideas for a non-linear viscous fluid, and demonstrate that the resulting effective action obeys a generalized fluctuation-dissipation theorem, which guarantees a local form of the second law.


Haehl, F. M., Loganayagam, R., & Rangamani, M. (2016). Topological sigma models & dissipative hydrodynamics. Journal of High Energy Physics, 2016(4), Article 39.

Journal Article Type Article
Acceptance Date Mar 21, 2016
Online Publication Date Apr 7, 2016
Publication Date Apr 7, 2016
Deposit Date Apr 4, 2019
Publicly Available Date Apr 4, 2019
Journal Journal of High Energy Physics
Print ISSN 1126-6708
Publisher Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed Peer Reviewed
Volume 2016
Issue 4
Article Number 39
Public URL


Published Journal Article (444 Kb)

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Copyright Statement
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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