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

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• Feshbach resonances in an optical lattice
• The Stochastic Green Function (SGF) algorithm
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• Quantum phases of mixtures of atoms and molecules on optical lattices
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Cited by in corpus (21)

• Ultracold bosons with short-range interaction in regular optical lattices
• Polaritons and Pairing Phenomena in Bose--Hubbard Mixtures
• Phases and phase transitions of frustrated hard-core bosons on a triangular ladder
• Ising Deconfinement Transition Between Feshbach-Resonant Superfluids
• Bose--Hubbard Models Coupled to Cavity Light Fields
• Discrete Symmetry Breaking Transitions Between Paired Superfluids
• Thermal Phase transitions in attractive extended Bose-Hubbard Model with three-body constraint
• The superfluid density in continuous and discrete spaces: Avoiding misconceptions
• Feshbach Resonance in Optical Lattices and the Quantum Ising Model
• Comment on "Feshbach-Einstein Condensates" by V. G. Rousseau and P. J. H. Denteneer
• Feshbach-Stabilized Insulator of Bosons in Optical Lattices
• Multiple Transitions of Coupled Atom-Molecule Bosonic Mixtures in Two Dimensions
• Counterflow superfluid of polaron pairs in Bose-Fermi mixtures in optical lattices
• Quantum and Thermal Phase Transitions in a Bosonic Atom-Molecule Mixture in a Two-dimensional Optical Lattice
• Quantum Phase Transitions in Bosonic Heteronuclear Pairing Hamiltonians
• Particle-Localized Ground State of Atom-Molecule Bose-Einstein Condensates in a Double-Well Potential
• Exotic Ising dynamics in a Bose-Hubbard model
• Two-channel Bose-Hubbard model of atoms at a Feshbach resonance
• Phase diagram of imbalanced strongly interacting fermions on a one-dimensional optical lattice
• Magnetic Properties of the Second Mott Lobe in Pairing Hamiltonians
• Quantum Triticality of Bosonic Atomic-Molecular Mixtures with Feshbach Coupling