Density-Matrix Renormalization Group Study of Trapped Imbalanced Fermi Condensates

Masaki Tezuka and Masahito Ueda
Phys. Rev. Lett. 100, 110403 – Published 19 March 2008

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 imbalance 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 quasicondensate up to at least P0.8. Possible experimental situations to test our predictions are discussed.

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  • Received 7 August 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.110403

©2008 American Physical Society

Authors & Affiliations

Masaki Tezuka1,* and Masahito Ueda1,2

  • 1Department of Physics, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
  • 2ERATO Macroscopic Quantum Control Project, JST, Tokyo 113-8656, Japan

  • *tezuka.m.aa@m.titech.ac.jp

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Issue

Vol. 100, Iss. 11 — 21 March 2008

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