The quench action approach in finite integrable spin chains
The quench action approach in finite integrable spin chains
We consider the problem of constructing the stationary state following a quantum quench, using the exact overlaps for finite size integrable models. We focus on the isotropic Heisenberg spin chain with initial state N\'eel or Majumdar-Ghosh (dimer), although the proposed approach is valid for an arbitrary integrable model. We consider …