Mean-field description of dynamical collapse of a fermionic condensate in a trapped boson-fermion mixture
arXiv:cond-mat/0407032 · doi:10.1103/PhysRevA.70.043617
Abstract
We suggest a time-dependent dynamical mean-field-hydrodynamic model for the collapse of a trapped boson-fermion condensate and perform numerical simulation based on it to understand some aspects of the experiment by Modugno et al. [Science 297, 2240 (2002)] on the collapse of the fermionic condensate in the 40K-87Rb mixture. We show that the mean-field model explains the formation of a stationary boson-fermion condensate at zero temparature with relative sizes compatible with experiment. This model is also found to yield a faithful representation of the collapse dynamics in qualitative agreement with experiment. In particular we consider the collapse of the fermionic condensate associated with (a) an increase of the number of bosonic atoms as in the experiment and (b) an increase of the attractive boson-fermion interaction using a Feshbach resonance. Suggestion for experiments of fermionic collapse using a Feshbach resonance is made.
8 pages, 7 PS figures, minor modifications in response to editor's comments, Physical Review A (accepted)
References in corpus (4)
- Bose-Einstein condensate collapse: a comparison between theory and experiment
- Collective excitations in trapped boson-fermion mixtures: from demixing to collapse
- Finite temperature effects on the collapse of trapped Bose-Fermi mixtures
- Collisional oscillations of trapped boson-fermion mixtures approaching collapse
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