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TT: Fachverband Tiefe Temperaturen

TT 37: MLT: Poster Session

TT 37.19: Poster

Donnerstag, 25. März 2010, 14:00–18:00, Poster A

Quenches in three dimensional ultracold bosonic systems — •Akos Rapp and Achim Rosch — Institut für Theoretische Physik, Universität zu Köln, 50937 Köln

Ultracold atoms provide clean systems to study phenomena related to the competition between kinetic, interaction and confinement energies under flexible experimental conditions. Confinement leads to phases which are absent in a homogeneous system, and the "Mott cake" structure in a strongly repulsing bosonic system is probably the most spectacular example. We study the bosonic Hubbard model in a three dimensional harmonic trap combining rapid quenches with adiabatic changes of the system parameters. Using a combination of the bosonic Gutzwiller approximation and high-temperature expansions we analyze how much entropy is generated during the quenches and investigate which phases can be stabilized in the trap.