Berlin 2014 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 34: Poster: Ultra-cold atoms, ions and BEC (with Q)

A 34.21: Poster

Mittwoch, 19. März 2014, 16:30–18:30, Spree-Palais

Coherently coupled two-component ultracold bosons — •Ulrike Bornheimer, Ivana Vidanovic, and Walter Hofstetter — Goethe Universität, Institut für Theoretische Physik, Max-von-Laue Straße 1, 60438 Frankfurt am Main

We investigate an ultracold, two-component bosonic gas in a cubic optical lattice. In addition to density-density interactions, the atoms are subject to coherent light matter interactions that couple different internal hyperfine states. In the strongly interacting Mott regime, the resulting Bose-Hubbard Model can be mapped onto an effective spin Hamiltonian. We examine the influence of the coherent coupling on the system and its' quantum phases by using Gutzwiller Mean Field as well as Bosonic Dynamical Mean Field Theory.