Dresden 2011 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 24: Quantum Gases: Opt. Lattice 1

Q 24.8: Talk

Wednesday, March 16, 2011, 12:15–12:30, HSZ 02

Emulating Frustrated Magnetism in Triangular Optical Lattices — •Julian Struck, Christoph Ölschläger, Christina Staarmann, Parvis Soltan-Panahi, Rodolphe Le Targat, Patrick Windpassinger, and Klaus Sengstock — Institut für Laser-Physik, Universität Hamburg, 22761 Hamburg, Germany

We present the experimental realization of a quantum simulator for magnetism with ultracold quantum gases in optical lattices. It is possible to emulate magnetic interactions of a xy-model – interestingly with spinless bosons – by applying a time periodic acceleration to the lattice as proposed by Eckardt et al. [1]. Several different magnetic phases of this model have successfully been realized. The most interesting is the frustrated spiral phase which exhibits exotic properties like time-reversal and spontaneous symmetry breaking.

These first results open the perspective to extremely complex and yet not well understood phases like the spin-liquid in a quantum xy-model.

[1] A. Eckardt et al 2010 EPL 89 10010