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A panoply of Schwinger-Keldysh transport
by Kristan Jensen, Raja Marjieh, Natalia Pinzani-Fokeeva, Amos Yarom
This Submission thread is now published as
Submission summary
| Authors (as registered SciPost users): | Kristan Jensen · Amos Yarom |
| Submission information | |
|---|---|
| Preprint Link: | https://arxiv.org/abs/1804.04654v3 (pdf) |
| Date accepted: | Nov. 22, 2018 |
| Date submitted: | Nov. 8, 2018, 1 a.m. |
| Submitted by: | Kristan Jensen |
| Submitted to: | SciPost Physics |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approach: | Theoretical |
Abstract
We classify all possible allowed constitutive relations of relativistic fluids in a statistical mechanical limit using the Schwinger-Keldysh effective action for hydrodynamics. We find that microscopic unitarity enforces genuinely new constraints on the allowed transport coefficients that are invisible in the classical hydrodynamic description; they are not implied by the second law or the Onsager relations. We term these conditions Schwinger-Keldysh positivity and provide explicit examples of the various allowed terms.
Author comments upon resubmission
We would like to thank both of the Referees for their comments and careful reading of our manuscript. We have fixed the various typos pointed out by Referee 2, as well as implemented the other two suggestions made.
List of changes
- We fixed the typos noted by Referee 2.
- We added a brief comment to the end of the Introduction referring the curious reader immediately to our summary and table in Section 8.1.
- We fixed the (incorrect as written) second sentence in Section 6.2.4.
Published as SciPost Phys. 5, 053 (2018)