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Form factor approach to diagonal finite volume matrix elements in Integrable QFT

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arxiv 1305.3373 v1 pith:TE7OBX3S submitted 2013-05-15 hep-th cond-mat.stat-mech

B. Pozsgay This is my paper · ORCID
classification hep-thcond-mat.stat-mech
keywords finitediagonalfactorformintegrablemeanstatevalues
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We derive an exact formula for finite volume excited state mean values of local operators in 1+1 dimensional Integrable QFT with diagonal scattering. Our result is a non-trivial generalization of the LeClair-Mussardo series, which is a form factor expansion for finite size ground state mean values.

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  1. Finite volume corrections of non-diagonal form factors

    hep-th 2019-08 conditional novelty 5.0 of 10

    The mu-term corrections from bound-state quantization are reproduced exactly as residues of the F-term integral for elementary non-diagonal form factors, confirming the connection between the two formalisms.

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