Theory of Diffusive Fluctuations

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• Xinyi Chen-Lin, Stanford/Nordita
• Thursday 25 June 2020, 16:00-17:00
• via zoom.

If you have a question about this talk, please contact C.VonKeyserlingk.

This talk is about the paper arXiv:1811.12540 [hep-th]. The modern approach of hydrodynamics is that of a non-equilibrium EFT , valid at sufficiently long times and large distances. Thus, only correlations of conserved quantities are relevant. We will consider the simplest scenario, with one conservation law (e.g. energy conservation), which leads to the classical diffusion equation at the thermodynamic limit. We will show how non-linear fluctuation terms lead to corrections to the diffusion constant. We will warm up with the stochastic path integral approach. Then, we will review the EFT approach that justifies the fluctuation terms from first principles. Possible physical implications of our results will be discussed in the end.

This talk is part of the Theoretical Physics Seminars series.

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• Bham Talks
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