title: Nonequilibrium dynamics of one-dimensional hard-core anyons following a quench: complete relaxation of one-body observables.
abstract: We demonstrate the role of interactions in driving the relaxation of an isolated integrable quantum system following a sudden quench. We consider a family of integrable hard-core lattice anyon models that continuously interpolates between noninteracting spinless fermions and strongly interacting hard-core bosons. A generalized Jordan-Wigner transformation maps the entire family to noninteracting fermions. We find that, aside from the singular free-fermion limit, the entire single-particle density matrix and, therefore, all one-body observables relax to the predictions of the generalized Gibbs ensemble (GGE). This demonstrates that, in the presence of interactions, correlations between particles in the many-body wave function provide the effective dissipation required to drive the relaxation of all one-body observables to the GGE. This relaxation does not depend on translational invariance or the tracing out of any spatial domain of the system.
authors.affiliation: The University of Queensland, School of Mathematics and Physics, Brisbane, Queensland 4072, Australia and Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California 93106, USA.
authors.forename: Tod M
authors.initials: TM
authors.lastname: Wright
authors.affiliation: Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California 93106, USA and Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
authors.forename: Marcos
authors.initials: M
authors.lastname: Rigol
authors.affiliation: The University of Queensland, School of Mathematics and Physics, Brisbane, Queensland 4072, Australia.
authors.forename: Matthew J
authors.initials: MJ
authors.lastname: Davis
authors.affiliation: The University of Queensland, School of Mathematics and Physics, Brisbane, Queensland 4072, Australia.
authors.forename: Karén V
authors.initials: KV
authors.lastname: Kheruntsyan