Ultracold three-body recombination in reduced dimensions

B.D. Esry
(Dept. of Physics, Kansas State University),

Chris H. Greene
(Dept. of Physics and JILA, Univ. of Colorado)

Recent experiments have begun to investigate ultracold quantum gases in reduced dimensions. One recent experiment in particular has measured three-body recombination for an effectively one-dimensional Bose-Einstein condensate~[1]. We have completed an analysis of the threshold behavior of the recombination rate for gases in 1D and 2D, and have found a surprising result: The threshold exponent for recombination of indistinguishable bosons is identical to that for indistinguishable fermions in 1D. In both cases, the recombination rate is suppressed as T^3. In 2D as in 3D, however, the rate for bosons is energy-independent and shows no suppression at threshold, whereas the identical fermion recombination rate is suppressed at T \rightarrow 0.

This work was supported by the Chemical Sciences, Geosciences and Biosciences Division,
Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy.

Submitted to DAMOP, May 2004 in Tucson, AZ.

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