Three-body decay of a rubidium Bose-Einstein condensate

Abstract

We have measured the three-body decay of a Bose-Einstein condensate of rubidium (${}^{87}$Rb) atoms prepared in the doubly polarized ground state $F=m_F=2$. Our data are taken for a peak atomic density in the condensate varying between $2\times 10^{14}$ cm${}^{-3}$ at initial time and $7\times 10^{13}$ cm${}^{-3}$, 16 seconds later. Taking into account the influence of the uncondensed atoms onto the decay of the condensate, we deduce a rate constant for condensed atoms $L=1.8(\pm 0.5)\times 10^{-29}$ cm${}^6$s${}^{-1}$. For these densities we did not find a significant contribution of two-body processes such as spin dipole relaxation.

14 pages, 4 figures

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