High Energy Physics - Theory
[Submitted on 7 May 2018 (v1), last revised 17 May 2018 (this version, v2)]
Title:TBA and tree expansion
View PDFAbstract:We propose an alternative, statistical, derivation of the Thermodynamic Bethe Ansatz based on the tree expansion of the Gaudin determinant. We illustrate the method on the simplest example of a theory with diagonal scattering and no bound states. We reproduce the expression for the free energy density and the finite size corrections to the energy of an excited state as well as the LeClair-Mussardo series for the one-point function for local operators.
Submission history
From: Ivan K. Kostov [view email][v1] Mon, 7 May 2018 16:03:34 UTC (342 KB)
[v2] Thu, 17 May 2018 08:19:14 UTC (281 KB)
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