Dynamics of pair correlations in the attractive Lieb-Liniger gas

Details Dynamics of pair correlations in the attractive Lieb-Liniger gas Dynamics of pair correlations in the attractive Lieb-Liniger gas

2010-06-28

arxiv.org/abs/1006.5312v1

Phys. Rev. Lett. 105, 150403 (2010)

Physics

Quantum Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.105.150403

We investigate the dynamics of a 1D Bose gas after a quench from the Tonks-Girardeau regime to the regime of strong attractive interactions applying analytical techniques and exact numerical simulations. After the quench the system is found to be predominantly in an excited gas-like state, the so-called super-Tonks gas, however with a small coherent admixture of two-particle bound states. Despite its small amplitude, the latter component leads to a rather pronounced oscillation of the local density-density correlation with a frequency corresponding to the binding energy of the pair, making two-particle bound states observable in an experiment. Contributions from bound states with larger particle numbers are found to be negligible.

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