  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.
