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Expectation Values of Local Fields in an Integrable Theory after a Quantum Quench

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Preprint
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Submission Date
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arXiv ID: 1304.7599
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arXiv
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Abstract

The expectation values of local fields of any interacting quantum theory after a quench process are key quantities for matching theoretical and experimental results. For quantum integrable field theories, we argue that they can be obtained by a generalization of the Leclair-Mussardo formula and a Bethe Ansatz result of Caux and Konik. Specializing to the Sinh-Gordon model and taking the non-relativistic limit, one can recover the results of Kormos et al. for the Lieb-Liniger model.

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