Polarized Superfluidity in the imbalanced attractive Hubbard model
arXiv:1002.2958 · doi:10.1143/JPSJ.79.064401
Abstract
We investigate the attractive Hubbard model in infinite spatial dimensions by means of dynamical mean-field theory. Using a continuous-time Monte Carlo algorithm in the Nambu formalism as an impurity solver, we directly deal with the superfluid phase in the population imbalanced system. By calculating the superfluid order parameter, the magnetization, and the density of states, we discuss how the polarized superfluid state is realized in the attractive Hubbard model at quarter filling. We find that a drastic change in the density of states is induced by spin imbalanced populations in the superfluid state.
7 pages and 8 figures
References in corpus (16)
- The numerical renormalization group method for quantum impurity systems
- Observation of Bose-Einstein Condensation of Molecules
- Fulde-Ferrell-Larkin-Ovchinnikov State in Heavy Fermion Superconductors
- Hybridization expansion impurity solver: General formulation and application to Kondo lattice and two-orbital models
- Continuous-time auxiliary field Monte Carlo for quantum impurity models
- Phase diagram of a cold polarized Fermi gas
- Diagrammatic Determinantal methods: projective schemes and applications to the Hubbard-Holstein model
- Density-Matrix Renormalization Group Study of Trapped Imbalanced Fermi Condensates
- Finite temperature phase diagram of a polarized Fermi gas in an optical lattice
- Continuous-Time Quantum Monte Carlo Method for the Coqblin-Schrieffer Model
- Dynamical mean-field theory and numerical renormalization group study of superconductivity in the attractive Hubbard model
- Luther-Emery Phase and Atomic-Density Waves in a Trapped Fermion Gas
- Supersolid state of ultracold fermions in an optical lattice
- Polarized superfluidity in the attractive Hubbard model with population imbalance
- Supersolids in confined fermions on one-dimensional optical lattices
- Spatially-modulated Superfluid States in Fermionic Optical Ladder Systems with Repulsive Interactions