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arXiv · 1008.3810

Form factor expansion for thermal correlators

B. Pozsgay·G. Takacs
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Abstract

We consider finite temperature correlation functions in massive integrable Quantum Field Theory. Using a regularization by putting the system in finite volume, we develop a novel approach (based on multi-dimensional residues) to the form factor expansion for thermal correlators. The first few terms are obtained explicitly in theories with diagonal scattering. We also discuss the validity of the LeClair-Mussardo proposal.

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B. Pozsgay, G. Takacs. 2010-10-28. Form factor expansion for thermal correlators. https://doi.org/10.1088/1742-5468%2F2010%2F11%2Fp11012

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