D. Muth, B. Schmidt, and M. Fleischhauer
University of Kaiserslautern
We theoretically analyze the dynamics of a one-dimensional Bose gas
with strong short-range interactions after an interaction quench. In
the attractive regime numerical simualtions of the many body system [1]
reproduce the formation of the meta-stable super Tonks-Giradeau gas
recently observed in cold atom experiments [2]. A quench from the Tonks
to the super-Tonks regime leads to a very small coherent admixture of
tightly bound-pair states, leading to an oscillatory behavior of the
two-particle correlation function. In the repulsive regime we investigate
a setup where the numerical simulations show, despite integrability
of the model, local thermalization on a short timescale [3]. The resulting
final state is consistent with the results from thermodynamic Bethe
ansatz.
[1] D. Muth, M. Fleischhauer, Phys. Rev. Lett. 2010 arxiv:1006.5312
[2] E. Haller et al. Science 325, 1224 (2009)
[3] D. Muth, B. Schmidt, M. Fleischhauer, New J. Phys. 12, 083065 (2010)