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The Space of Integrable Systems from Generalised TˉT-Deformations
by Benjamin Doyon, Joseph Durnin, Takato Yoshimura
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Submission summary
Authors (as registered SciPost users): | Takato Yoshimura |
Submission information | |
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Preprint Link: | https://arxiv.org/abs/2105.03326v4 (pdf) |
Date submitted: | 2021-12-30 17:08 |
Submitted by: | Yoshimura, Takato |
Submitted to: | SciPost Physics |
Ontological classification | |
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Academic field: | Physics |
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Approach: | Theoretical |
Abstract
We introduce an extension of the generalised TˉT-deformation described by Smirnov-Zamolodchikov, to include the complete set of extensive charges. We show that this gives deformations of S-matrices beyond CDD factors, generating arbitrary functional dependence on momenta. We further derive from basic principles of statistical mechanics the flow equations for the free energy and all free energy fluxes. From this follows, without invoking the microscopic Bethe ansatz or other methods from integrability, that the thermodynamics of the deformed models are described by the integral equations of the thermodynamic Bethe-Ansatz, and that the exact average currents take the form expected from generalised hydrodynamics, both in the classical and quantum realms.
Author comments upon resubmission
List of changes
1. We added the following sentence in Sect. 5: "To be more precise, we shall show that by solving the flowequations of a generalised TˉT-deformed theory parameterised by λθϕ, which was shown to be equivalent to the integrable model whose phase shift is λθϕ in Sect. 3, we obtain the free energy and the free energy fluxes that coincide with those of the corresponding integrable.
2. We replaced Appendic C with F in the last paragraph of Section 5.