Interaction-driven dynamics of K40-Rb87 fermion-boson gas mixtures in the large-particle-number limit

C. Ospelkaus, S. Ospelkaus, K. Sengstock, K. Bongs

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130 Citations (Scopus)

Abstract

We have studied effects of interspecies attraction in a Fermi-Bose mixture over a large regime of particle numbers in the K40-Rb87 system. We report on the observation of a mean-field driven collapse at critical particle numbers of 1.2×106 Rb87 atoms in the condensate and 7.5×105 K40 atoms consistent with mean-field theory for a scattering length of aFB=-284a0. For large overcritical particle numbers, we see evidence for revivals of the collapse. Part of our detailed study of the decay dynamics and mechanisms is a measurement of the (Rb87-Rb87-K40) three-body loss coefficient K3=(2.8±1.1)×10-28cm6/s, which is an important parameter for dynamical studies of the system.

Original languageEnglish
Article number020401
JournalPhysical Review Letters
Volume96
Issue number2
DOIs
Publication statusPublished - 20 Jan 2006

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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