Expansion of a quantum degenerate boson-fermion mixture

Abstract

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.

arXiv commentRevtex, 7 pages + 6 figures

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• Finite temperature effects on the collapse of trapped Bose-Fermi mixtures
• The stability and free expansion of a dipolar Fermi gas
• Expansion of a Fermi gas interacting with a Bose-Einstein condensate
• Collective oscillations of a Bose-Fermi mixture: Effect of unequal mass of Bose and Fermi particles
• Effective self-similar expansion for the Gross-Pitaevskii equation
• Dynamical properties of a trapped dipolar Fermi gas at finite temperature
• Heteronuclear quantum gas mixtures
• Effective self-similar expansion of a Bose-Einstein condensate: Free space vs confined geometries
• Effective Scaling Approach to Frictionless Quantum Quenches in Trapped Bose Gases
• Efficient matter-wave lensing of ultracold atomic mixtures
• Scaling dynamics of the ultracold Bose gas
• Calorimetry of a harmonically trapped Bose gas