Schedule Oct 15, 2010
Dynamics of Repulsively and Attractively Interacting Bosons in 1D After an Interaction Quench
Dominik Muth (Univ. Kaiserslautern)

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)

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