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Abstract:

During the last decade a host of experiments has established the existence of highly unconventional states of matter in a variety of low dimensional quantum systems. These include equilibrium states characterized by topological properties as well as stationary states in out of equilibrium situations. Both of these give access to hitherto unexplored areas of many-body quantum physics. The key aim of the workshop was to bring together experts in several different research areas revolving around novel quantum states of matter.

Abstract:

We consider quantum quenches in integrable models. We argue that the behavior of local observables at late times after the quench is given by their expectation values with respect to a single representative Hamiltonian eigenstate. This can be viewed as a generalization of the eigenstate thermalization hypothesis to quantum integrable models. We present a method for constructing this representative state by means of a generalized thermodynamic Bethe ansatz (GTBA). Going further, we introduce a framework for calculating the time dependence of local observables as they evolve towards their stationary values. As an explicit example we consider quantum quenches in the transverse-field Ising chain and show that previously derived results are recovered efficiently within our framework. © 2013 American Physical Society.