Tuesday, July 9, 2013

1307.2142 (Márton Kormos et al.)

Analytic results for a quantum quench from free to hard-core one
dimensional bosons

Márton Kormos, Mario Collura, Pasquale Calabrese
It is widely believed that the stationary properties after a quantum quench in integrable systems can be described by a generalized Gibbs ensemble (GGE), even if all the analytical evidence is based on free theories in which the pre- and post-quench modes are linearly related. In contrast, we consider the experimentally relevant quench of the one-dimensional Bose gas from zero to infinite interaction, in which the relation between modes is nonlinear. We provide exact analytical results for the dynamical density-density correlation function at any time after the quench and we prove that its stationary value is described by a GGE.
View original: http://arxiv.org/abs/1307.2142

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