title: Quenching the anisotropic heisenberg chain: exact solution and generalized Gibbs ensemble predictions.
abstract: We study quenches in integrable spin-1/2 chains in which we evolve the ground state of the antiferromagnetic Ising model with the anisotropic Heisenberg Hamiltonian. For this nontrivially interacting situation, an application of the first-principles-based quench-action method allows us to give an exact description of the postquench steady state in the thermodynamic limit. We show that a generalized Gibbs ensemble, implemented using all known local conserved charges, fails to reproduce the exact quench-action steady state and to correctly predict postquench equilibrium expectation values of physical observables. This is supported by numerical linked-cluster calculations within the diagonal ensemble in the thermodynamic limit.
authors.affiliation: Institute for Theoretical Physics, University of Amsterdam, Science Park 904, Postbus 94485, 1090 GL Amsterdam, Netherlands.
authors.forename: B
authors.initials: B
authors.lastname: Wouters
authors.affiliation: Institute for Theoretical Physics, University of Amsterdam, Science Park 904, Postbus 94485, 1090 GL Amsterdam, Netherlands.
authors.forename: J
authors.initials: J
authors.lastname: De Nardis
authors.affiliation: Institute for Theoretical Physics, University of Amsterdam, Science Park 904, Postbus 94485, 1090 GL Amsterdam, Netherlands.
authors.forename: M
authors.initials: M
authors.lastname: Brockmann
authors.affiliation: Institute for Theoretical Physics, University of Amsterdam, Science Park 904, Postbus 94485, 1090 GL Amsterdam, Netherlands.
authors.forename: D
authors.initials: D
authors.lastname: Fioretto
authors.affiliation: Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
authors.forename: M
authors.initials: M
authors.lastname: Rigol
authors.affiliation: Institute for Theoretical Physics, University of Amsterdam, Science Park 904, Postbus 94485, 1090 GL Amsterdam, Netherlands.
authors.forename: J-S
authors.initials: JS
authors.lastname: Caux