Published in
American Physical Society, Physical Review Letters, 24(110)
DOI: 10.1103/physrevlett.110.245301
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Equilibration of a Tonks-Girardeau gas following a trap release
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Abstract
We study the non-equilibrium dynamics of a Tonks-Girardeau gas released from a parabolic trap to a circle. We present the exact analytic solution of the many body dynamics and prove that, for large times and in a properly defined thermodynamic limit, the reduced density matrix of any finite subsystem converges to a generalized Gibbs ensemble. The equilibration mechanism is expected to be the same for all one-dimensional systems. ; Comment: 5+3 pages, 4+1 figures, v2 includes supplementary materials