Dresden 2009 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 41: Matter at Low Temperature: Quantum Liquids, Bose-Einstein-Condensates, Ultra-cold Atoms
TT 41.17: Vortrag
Donnerstag, 26. März 2009, 18:30–18:45, HSZ 105
Solids and Supersolids of Three-Body Interacting Polar Molecules on an Optical Lattice — Kai P. Schmidt1, Julien Dorier2, and •Andreas Läuchli3 — 1Lehrstuhl für theoretische Physik I, TU Dortmund, Dortmund, Germany — 2CTMC, EPFL, Lausanne, Switzerland — 3MPI für Physik komplexer Systeme, Dresden, Germany
We study the physics of cold polar molecules loaded into an optical lattice in the regime of strong three-body interactions, as put forward recently by Büchler et al. [Nature Phys. 3, 726 (2007)]. To this end, quantum Monte Carlo simulations, exact diagonalization, and a semiclassical approach are used to explore hard-core bosons on the 2D square lattice which interact solely by long-ranged three-body terms. The resulting phase diagram shows a sequence of solid and supersolid phases. Our findings are directly relevant for future experimental implementations and open a new route towards the discovery of a lattice supersolid phase in experiment.