Hannover 2016 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 27: Poster: Quantum Optics and Photonics II

Q 27.18: Poster

Dienstag, 1. März 2016, 16:30–19:00, Empore Lichthof

Experimental realization of a Bose-Hubbard model with cavity-mediated long-range interactions — •Nishant Dogra, Renate Landig, Lorenz Hruby, Manuele Landini, Rafael Mottl, Tobias Donner, and Tilman Esslinger — HPF D4, Quantum Optics Group, Institute for Quantum Electronics, ETH Zurich, Otto-Stern-Weg-1, Zurich, Switzerland-8093

We experimentally investigate an extended Bose-Hubbard model with cavity-mediated long-range interactions using an ultracold atomic gas. The long-range interactions are generated by coupling a BEC to the single mode of a high-finesse cavity and pumping it with a transverse laser-field. The competition among three energy scales- tunnelling, short-range interactions and long-range interactions gives rise to a rich phase diagram consisting of four different phases - a superfluid, a supersolid, a Mott insulator and a charge density wave. Moreover, we study the transition between the two insulating phases - charge density wave and Mott insulator - and observe a hysteretic behaviour. We also investigate theoretically the various features of such an extended Bose-Hubbard model using different mean-field approaches.