The dynamics of a Bose-Einstein condensate confined in optical trap is studied taking into consideration fluctuations of the laser field intensity. The noise can delay or even arrest the collapse of a condensate with negative scattering length.

Nonlinear Guided Waves and Their ApplicationsJan 1, 20010 citations

Springer eBooks

Collisional and Collapse Dynamics of a Twin Bose-Einstein Condensate with Negative Scattering Length

Weiping Zhang, Karl-Peter Marzlin, Leon Tribe, Barry C. Sanders

Published Nov 16, 2007• 0 citations

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DOI: 10.1007/3-540-40894-0_7

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We determine the interspecies

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-wave triplet scattering length

{a}_{3}

for all K-Rb isotopic mixtures by measuring the elastic cross section for collisions between

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in different temperature regimes. The positive value ${a}_{3}=+{163}_{\ensuremath{-}12}^{+57}{a}_{0}$ ensures the stability against collapse of binary $^{41}\mathrm{K}\ensuremath{-}^{87}\mathrm{R}\mathrm{b}$ Bose-Einstein condensates. For the fermion-boson mixture $^{40}\mathrm{K}\ensuremath{-}^{87}\mathrm{R}\mathrm{b}$, we obtain a large and negative scattering length which implies an efficient sympathetic cooling of the fermionic species down to the degenerate regime.