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Fluctuation-dissipation theorem in an isolated system of quantum dipolar bosons after a quench
Ehsan Khatami1, Guido Pupillo, Mark Srednicki
1Department of Physics, University of California, Santa Cruz, California 95064, USA.
Abstract:
We examine the validity of fluctuation-dissipation relations in isolated quantum systems taken out of equilibrium by a sudden quench. We focus on the dynamics of trapped hard-core bosons in one-dimensional lattices with dipolar interactions whose strength is changed during the quench. We find indications that fluctuation-dissipation relations hold if the system is nonintegrable after the quench, as well as if it is integrable after the quench if the initial state is an equilibrium state of a nonintegrable Hamiltonian. On the other hand, we find indications that they fail if the system is integrable both before and after quenching.
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