title: Infinite-time average of local fields in an integrable quantum field theory after a quantum quench.
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.
authors.affiliation: SISSA and INFN, Sezione di Trieste, via Bonomea 265, I-34136 Trieste, Italy and International Centre for Theoretical Physics (ICTP), I-34151 Trieste, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Mussardo