Infinite-Time Average of Local Fields in an Integrable Quantum Field Theory After a Quantum Quench
Giuseppe MussardoSISSA and INFN, Sezione di Trieste, via Bonomea 265, I-34136 Trieste, Italy and International Centre for Theoretical Physics (ICTP), I-34151 Trieste, Italy
2013en
ABI
Abstract
The infinite-time average of the expectation values of local fields of any interacting quantum theory after a global quench process are key quantities for matching theoretical and experimental results. For quantum integrable field theories, we show that they can be obtained by an ensemble average that employs a particular limit of the form factors of local fields and quantities extracted by the generalized Bethe ansatz.
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