We revisit the exact thermodynamic description of the classical sine-Gordon field theory, a well-known integrable model. We found that existing results in the literature based on the soliton-gas picture did not correctly take into account light, but extended, solitons and thus led to incorrect results. This issue is regularized upon requantization: we derive the correct thermodynamics by taking the semiclassical limit of the quantum model. Our results are then extended to transport settings by means of Generalized Hydrodynamics.
Cited by 5
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- 1 Institute of Physics, University of Amsterdam [IoP, UvA]
- 2 Technische Universität München / Technical University of Munich [TUM]
- 3 Munich Center for Quantum Science and Technology [MCQST]