Rapidly Quenched Kosterlitz-Thouless Superfluid Transitions

Details Rapidly Quenched Kosterlitz-Thouless Superfluid Transitions Rapidly Quenched Kosterlitz-Thouless Superfluid Transitions

2000-10-28

arxiv.org/abs/cond-mat/0010461v4

Physics

Condensed Matter

Statistical Mechanics

4 pages, 5 figures, revtex4, version accepted for PRL

Scientific paper

10.1103/PhysRevLett.86.2585

Rapidly quenched Kosterlitz-Thouless (KT) superfluid transitions are studied by solving the Fokker-Planck equation for the vortex-pair dynamics in conjunction with the KT recursion relations. Power-law decays of the vortex density at long times are found, and the results are in agreement with a scaling proposal made by Minnhagen and co-workers for the dynamical critical exponent. The superfluid density is strongly depressed after a quench, with the subsequent recovery being logarithmically slow for starting temperatures near T$_{KT}$. No evidence is found of vortices being ''created'' in a rapid quench, there is only decay of the existing thermal vortex pairs.

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