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Bound states and nonequilibrium time evolution in integrable and nearly integrable models

Hans-Gerd Evertz, TU Graz

16.10.2015 at 09:00 

String states have been difficult to see experimentally. I will discuss a nonequilibrium setup with a local quench in which these states become prominently visible in time dependent DMRG as well as in exact Bethe ansatz  calculations. They persist even when integrability breaking perturbations are included. Following our setup, such bound states have recently been observed in a cold atom experiment. When a particle is scattered off a string of bound particles(in several integrable and nearly integrable models) we show that there is a simple but intruiging pattern, very different from classical behavior. Potential applications will be discussed.

A 450 - Theresienstr. 37