BEGIN:VCALENDAR VERSION:2.0 PRODID:Data::ICal 0.22 BEGIN:VEVENT DESCRIPTION:Brian DeSalvo\, University of Chicago\n\n
A gas of atoms coole d to sufficiently low temperature will form either a Bose-Einstein condens ate (BEC) or a degenerate Fermi gas (DFG) depending on the quantum statist ics of the constituent particles. But what happens when you combine a BEC and a DFG in an optical trap and add a healthy dose of interspecies intera ctions? Mean-field theory predicts three possible outcomes: a miscible mix ture for weak interactions\, complete demixing for strong repulsive intera ctions\, or a spectacular collapse due to the loss of mechanical stability for strong attractive interactions. In this talk\, I will discuss our eff orts to answer this question experimentally in the specific case where the bosons are much heavier than the fermions. To this end\, we have created the first quantum degenerate mixture of bosonic 133Cs and fermionic 6Li and used an interspecies Feshbach resonance to tune the interactions between the bosons and fermions. For at tractive interspecies interactions\, we find two surprising results. First \, \; we show that a degenerate Fermi gas of Li can be trapped by a Cs BEC\, even in the absence of external potentials. Second\, for strong att ractive interactions where collapse is predicted\, we observe no such inst ability. I will discuss the mechanisms at play to explain these results an d comment on current and future studies delving deeper into these unexpect ed regimes.
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\n\n \;< /p>\n DTSTART:20180223T203000Z LOCATION:Physics Building\, Room 204 SUMMARY:Quantum Mixology: Creating Novel Interacting Bose-Fermi Mixtures wi th Cs and Li END:VEVENT END:VCALENDAR