Expansion of a quantum degenerate boson-fermion mixture

Details Expansion of a quantum degenerate boson-fermion mixture Expansion of a quantum degenerate boson-fermion mixture

2003-01-13

arxiv.org/abs/cond-mat/0301182v1

Phys. Rev. A 67, 063614 (2003)

Physics

Condensed Matter

Revtex, 7 pages + 6 figures

Scientific paper

10.1103/PhysRevA.67.063614

We study the expansion of an ultracold boson-fermion mixture released from an elongated magnetic trap, in the context of a recent experiment at LENS (G. Roati et al., Phys. Rev. Lett. 89, 150403 (2002)). We discuss in some details the role of the boson-fermion interaction on the evolution of the radial-to-axial aspect ratio of the condensate, and show that it depends crucially on the relative dynamics of the condensate and degenerate Fermi gas in the radial direction, which is characterized by the ratio between the trapping frequency for fermions and for bosons. Our numerical simulations are in reasonable agreement with the experiment.

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