Feshbach-Einstein condensates

Abstract

We investigate the phase diagram of a two-species Bose-Hubbard model describing atoms and molecules on a lattice, interacting via a Feshbach resonance. We identify a region where the system exhibits an exotic super-Mott phase and regions with phases characterized by atomic and/or molecular condensates. Our approach is based on a recently developed exact quantum Monte Carlo algorithm: the Stochastic Green Function algorithm with tunable directionality. We confirm some of the results predicted by mean-field studies, but we also find disagreement with these studies. In particular, we find a phase with an atomic but no molecular condensate, which is missing in all mean-field phase diagrams.

4 pages, 6 figures

References in corpus (6)

• A High Phase-Space-Density Gas of Polar Molecules
• The Stochastic Green Function (SGF) algorithm
• Directed update for the Stochastic Green Function algorithm
• Superfluid and Mott Insulator phases of one-dimensional Bose-Fermi mixtures
• Quantum phases of mixtures of atoms and molecules on optical lattices
• Mott insulator to superfluid transition of ultracold bosons in an optical lattice near a Feshbach resonance

Cited by in corpus (1)

• Phase diagram of imbalanced strongly interacting fermions on a one-dimensional optical lattice