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arXiv · hep-th/9611238

Exact expectation values of local fields in quantum sine-Gordon model

S. Lukyanov·A. Zamolodchikov
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Abstract

We propose an explicit expression for vacuum expectation values of the exponential fields in the sine-Gordon model. Our expression agrees both with semi-classical results in the sine-Gordon theory and with perturbative calculations in the Massive Thirring model. We use this expression to make new predictions about the large-distance asymptotic form of the two-point correlation function in the XXZ spin chain.

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S. Lukyanov, A. Zamolodchikov. 1996-11-29. Exact expectation values of local fields in quantum sine-Gordon model. https://doi.org/10.1016/s0550-3213(97)00123-5

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