Joint ICTP/SISSA Condensed Matter seminar: "What happens when Bosons are interacting, confined and are at a finite temperature?"
Starts 8 May 2009 17:30
Ends 8 May 2009 20:00
Central European Time
Leonardo da Vinci Building Seminar Room
Strada Costiera, 11
I - 34151 Trieste (Italy)
The successful observation of Bose-Einstein condensation (BEC) in weakly interacting dilute alkali gases, confined by inertial magneto-optic traps, has provoked a flood of activities both theoretically and experimentally. By majority the ground state properties of interacting and confined Bosons are studied with the stationary solutions of Gross-Pitaevskii (GP) mean-field equation. In this talk as a contrast, I shall present a general microscopic theory of confined interacting Bosons at non-zero temperature. The method employed for this investigation is the double-time temperature Green function technique. I shall discuss some new results beyond the usual mean-field theory and highlight the crucial role of temperature, confinement and interaction to the properties; namely energetics and depletion of the condensates. I shall also discuss the collective modes of the confined Bosons.