6533b825fe1ef96bd1281dfd
RESEARCH PRODUCT
Mott transitions in ternary flavor mixtures of ultracold fermions on optical lattices
N. BlümerE. V. Goreliksubject
Condensed Matter::Quantum GasesPhysicsOptical latticeStrongly Correlated Electrons (cond-mat.str-el)Hubbard modelCondensed matter physicsQuantum Monte CarloFOS: Physical sciencesFermionAtomic and Molecular Physics and OpticsCondensed Matter - Strongly Correlated ElectronsMultigrid methodQuantum Gases (cond-mat.quant-gas)Quantum mechanicsCompressibilityInvariant (mathematics)Condensed Matter - Quantum GasesTernary operationdescription
Ternary flavor mixtures of ultracold fermionic atoms in an optical lattice are studied in the case of equal, repulsive on-site interactions U>0. The corresponding SU(3) invariant Hubbard model is solved numerically exactly within dynamical mean-field theory using multigrid Hirsch-Fye quantum Monte Carlo simulations. We establish Mott transitions close to integer filling at low temperatures and show that the associated signatures in the compressibility and pair occupancy persist to high temperatures, i.e., should be accessible to experiments. In addition, we present spectral functions and discuss the properties of a ``semi-compressible'' state observed for large U near half filling.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-04-29 | Physical Review A |