Regensburg 2007 – scientific programme

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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 K_ρ 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.