Phase separation in a boson-fermion mixture of Lithium atoms

Details Phase separation in a boson-fermion mixture of Lithium atoms Phase separation in a boson-fermion mixture of Lithium atoms

2001-12-11

arxiv.org/abs/cond-mat/0112183v2

Physics

Condensed Matter

Statistical Mechanics

8 pages, 4 figures, new version of Fig. 4 and typos corrected

Scientific paper

10.1088/0953-4075/35/4/102

We use a semiclassical three-fluid model to analyze the conditions for spatial phase separation in a mixture of fermionic Li-6 and a (stable) Bose-Einstein condensate of Li-7 atoms under cylindrical harmonic confinement, both at zero and finite temperature. We show that with the parameters of the Paris experiment [F. Schrek et al., Phys. Rev. Lett. 87 080403 (2001)] an increase of the boson-fermion scattering length by a factor five would be sufficient to enter the phase-separated regime. We give examples of configurations for the density profiles in phase separation and estimate that the transition should persist at temperatures typical of current experiments. For higher values of the boson-fermion coupling we also find a new phase separation between the fermions and the bosonic thermal cloud at finite temperature.

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