Mean-field description of a dynamical collapse of a fermionic condensate in a trapped boson-fermion mixture

Journal Article · Fri Oct 01 04:00:00 EDT 2004 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.70.043617· OSTI ID:20646411

Adhikari, Sadhan K ^[1]

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1. Instituto de Fisica Teorica, Universidade Estadual Paulista, 01.405-900 Sao Paulo, Sao Paulo (Brazil)

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 {sup 40}K- {sup 87}Rb mixture. We show that the mean-field model explains the formation of a stationary boson-fermion condensate at zero temperature 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.

• OSTI ID: 20646411
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 70; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
BOSONS
COMPUTERIZED SIMULATION
FERMIONS
HYDRODYNAMICS
MEAN-FIELD THEORY
MIXTURES
NUMERICAL ANALYSIS
POTASSIUM 40
RESONANCE
RUBIDIUM 87
TIME DEPENDENCE
TRAPPING