Density-Matrix Renormalization Group Study of Trapped Imbalanced Fermi Condensates

Abstract

The density-matrix renormalization group is employed to investigate a harmonically-trapped imbalanced Fermi condensate based on a one-dimensional attractive Hubbard model. The obtained density profile shows a flattened population difference of spin-up and spin-down components at the center of the trap, and exhibits phase separation between the condensate and unpaired majority atoms for a certain range of the interaction and population imabalance $P$. The two-particle density matrix reveals that the sign of the order parameter changes periodically, demonstrating the realization of the Fulde-Ferrell-Larkin-Ovchinnikov phase. The minority spin atoms contribute to the quasi-condensate up to at least $P\simeq 0.8$. Possible experimental situations to test our predictions are discussed.

4 pages, 3 figures; added references; accepted for publication in Phys. Rev. Lett

References in corpus (3)

• Molecular Probe of Pairing in the BEC-BCS Crossover
• Pairing states of a polarized Fermi gas trapped in a one-dimensional optical lattice
• Mean field thermodynamics of a spin-polarized spherically trapped Fermi gas at unitarity

Cited by in corpus (14)

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• Quantum phase diagram of fermion mixtures with population imbalance in one-dimensional optical lattices
• Pair correlations of a spin-imbalanced Fermi gas on two-leg ladders
• Magnetic ordering and quantum statistical effects in strongly repulsive Fermi-Fermi and Bose-Fermi mixtures
• Pair formation and collapse in imbalanced Fermion populations with unequal masses
• Spectral properties of a partially spin-polarized one-dimensional Hubbard/Luttinger superfluid
• Magnetism and quantum phase transitions in spin-1/2 attractive fermions with polarization
• Correlation Effects on Atom Density Profiles of 1-D and 2-D Polarized Atomic-Fermi-Gas Loaded on Optical Lattice
• Mott Phase in Polarized Two-component Atomic Fermi Lattice Gas:A Playground for S=1/2 Heisenberg Model in Magnetic Field
• Suppression or enhancement of the Fulde-Ferrell-Larkin-Ovchinnikov order in a one-dimensional optical lattice with particle correlated tunnelling
• Phase diagram of a bosonic ladder with two coupled chains