Anisotropic pair-superfluidity of trapped two-component Bose gases

Abstract

We theoretically investigate the pair-superfluid phase of two-component ultracold gases with negative inter-species interactions in an optical lattice. We establish the phase diagram for filling $n=1$ at zero and finite temperature, by applying Bosonic Dynamical Mean-Field Theory, and confirm the stability of pair-superfluidity for asymmetric hopping of the two species. While the pair superfluid is found to be robust in the presence of a harmonic trap, we observe that it is destroyed already by a small population imbalance of the two species.

7 pages, 11 figures

References in corpus (20)

• Many-Body Physics with Ultracold Gases
• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Single-Atom Resolved Fluorescence Imaging of an Atomic Mott Insulator
• Time-resolved Observation and Control of Superexchange Interactions with Ultracold Atoms in Optical Lattices
• Double species condensate with tunable interspecies interactions
• Atomic three-body loss as a dynamical three-body interaction
• Degenerate Bose-Bose mixture in a three-dimensional optical lattice
• Cooling in strongly correlated optical lattices: prospects and challenges
• Superfluidity of Interacting Bosonic Mixtures in Optical Lattices
• Spin gradient demagnetization cooling of ultracold atoms
• Correlated bosons on a lattice: Dynamical mean-field theory for Bose-Einstein condensed and normal phases
• Pair Superfluidity of Three-Body Constrained Bosons in Two Dimensions
• Mott-insulator phases of non-locally coupled 1D dipolar Bose gases
• Creating a supersolid in one-dimensional Bose mixtures
• Superfluid-Insulator Transitions in Attractive Bose-Hubbard Model with Three-Body Constraint
• Unusual states of vortex matter in mixtures of Bose--Einstein Condensates on rotating optical lattices
• Quantum phase transitions of two-species bosons in square lattice
• Pomeranchuk effect and spin-gradient cooling of Bose-Bose mixtures in an optical lattice
• Quantum and Thermal Transitions Out of the Pair-Supersolid Phase of Two-Species Bosons in Lattice
• Noise correlations of one-dimensional Bose mixtures in optical lattices

Cited by in corpus (9)

• Demixing Effects in Mixtures of Two Bosonic Species
• Supersolidity of lattice Bosons immersed in strongly correlated Rydberg dressed atoms
• Persistent currents in Bose-Bose mixtures after an interspecies interaction quench
• Quantum phases of bosonic chiral molecules in helicity lattices
• Cubic-quintic nonlinearity in superfluid Bose-Bose mixtures in optical lattices: Heavy solitary waves, barrier-induced criticality, and current-phase relations
• Valence bond supersolid in a bilayer extended Bose Hubbard model
• Phase diagrams and multistep condensations of spin-1 bosonic gases in optical lattices
• Phase Coherence and Fragmentation of Two-Component Bose-Einstein Condensates Loaded in State-Dependent Optical Lattices
• Magnetisms of spinor alkali and alkaline-earth atoms in optical lattices