Dimer states in atomic mixtures
arXiv:cond-mat/0612417 · doi:10.1103/PhysRevA.77.013623
Abstract
A mixture of heavy atoms in a Mott state and light spin-1/2 fermionic atoms is studied in an optical lattice. Inelastic scattering processes between both atomic species excite the heavy atoms and renormalize the tunneling rate as well as the interaction of the light atoms. An effective Hamiltonian for the latter is derived that describes tunneling of single fermions, tunneling of fermionic pairs and an exchange of fermionic spins. Low energy states of this Hamiltonian are a Néel state for strong effective repulsion, dimer states for moderate interaction, and a density wave of paired fermions for strong effective attraction.
10 pages, 3 figure, extended version
References in corpus (19)
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
- Ultracold atomic gases in optical lattices: mimicking condensed matter physics and beyond
- Fermionic atoms in a 3D optical lattice: Observing Fermi-surfaces, dynamics and interactions
- Conversion of an Atomic Fermi Gas to a Long-Lived Molecular Bose Gas
- Coherent transport of neutral atoms in spin-dependent optical lattice potentials
- Dynamics of F=2 Spinor Bose-Einstein Condensates
- Bose-Fermi Mixtures in a Three-dimensional Optical Lattice
- Observation of Feshbach resonances between two different atomic species
- Deformation of a Trapped Fermi Gas with Unequal Spin Populations
- Three dimensional resonating valence bond liquids and their excitations
- Interaction-driven Dynamics of 40K / 87Rb Fermi-Bose Gas Mixtures in the Large Particle Number Limit
- Sodium Bose-Einstein Condensates in the F=2 State in a Large-volume Optical Trap
- Bond algebraic liquid phase in strongly correlated multiflavor cold atom systems
- Quantum phases in mixtures of fermionic atoms
- Two-component Bose gas in an optical lattice at single-particle filling
- Fluctuations in the formation time of ultracold dimers from fermionic atoms
- Mixtures of fermionic atoms in an optical lattice
- Jahn-Teller systems at half filling: crossover from Heisenberg to Ising behavior
- Doorway states and the Bose-Hubbard model