Quantum quenches in the sinh-Gordon model: steady state and one point correlation functions

Understand

We consider quantum quenches to the sinh-Gordon integrable quantum field theory from a particular class of initial states.

• Our analysis includes the case of mass and interaction quenches starting from a non-interacting theory.
• By means of the recently developed quench action method, we fully characterize the stationary state reached at long times after the quench in terms of the corresponding rapidity distribution.
• We also provide exact results for the expectation values of arbitrary vertex operators in the post-quench stationary state by proposing a formula based on the analogy with the standard thermodynamic Bethe ansatz.