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TT: Fachverband Tiefe Temperaturen
TT 25: Quantum Liquids, Bose-Einstein Condensates, Ultracold Atoms, ...
TT 25.4: Talk
Thursday, March 29, 2007, 14:45–15:00, H18
Supersolids in confined fermions on one-dimensional optical lattices — •Farshid Karim Pour1, Marcos Rigol2, Stefan Wessel1, and Alejandro Muramatsu1 — 1Institut für Theoretische Physik III, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany — 2Department of Physics and Astronomy, University of Southern California Los Angeles, CA 90089, USA
Using quantum Monte Carlo simulations, we show that density-density and pairing correlation functions of the one-dimensional attractive fermionic Hubbard model in a harmonic potential can be characterized by the anomalous dimension Kρ of a corresponding periodic system. This allows to determine the conditions for a supersolid in a harmonic trap. We show explicitely, that under these conditions the structure form factors for both correlation functions scale with the same exponent as the system size increases, giving rise to a (quasi-) supersolid.