Expansion of a Fermi gas interacting with a Bose-Einstein condensate

Abstract

We study the expansion of an atomic Fermi gas interacting attractively with a Bose-Einstein condensate. We find that the interspecies interaction affects dramatically both the expansion of the Fermi gas and the spatial distribution of the cloud in trap. We observe indeed a slower evolution of the radial-to-axial aspect ratio which reveals the importance of the mutual attraction between the two samples during the first phase of the expansion. For large atom numbers, we also observe a bimodal momentum distribution of the Fermi gas, which reflects directly the distribution of the mixture in trap. This effect allows us to extract information on the dynamics of the system at the collapse.

arXiv comment4 pages, 4 figures

References in corpus (10)

• Theory of Bose-Einstein condensation in trapped gases
• Observation of a Strongly-Interacting Degenerate Fermi Gas of Atoms
• Observation of Bose-Einstein Condensation of Molecules
• Fermi-Bose quantum degenerate ^40 K - ^87 Rb mixture with attractive interaction
• Measurement of interaction energy near a Feshbach resonance in a 6Li Fermi gas
• Measurement of positive and negative scattering lengths in a Fermi gas of atoms
• Expansion of an interacting Fermi gas
• Magnetic control of the interaction in ultracold K-Rb mixtures
• Dynamics of a classical gas including dissipative and mean field effects
• Expansion of a quantum degenerate boson-fermion mixture

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• Generalized Dynamical Mean-Field Theory for Bose-Fermi Mixtures in Optical Lattices
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