## Abstract

We consider pairing in a three-component gas of degenerate fermions. In particular, we solve the finite-temperature mean-field theory of an interacting gas for a system where both interaction strengths and fermion masses can be unequal. At zero temperature, we find the possibility of a quantum phase transition between states associated with pairing between different pairs of fermions. On the other hand, finite-temperature behavior of the three-component system reveals some qualitative differences from the two-component gas: for a range of parameters it is possible to have two different critical temperatures. The lower one corresponds to a transition between different pairing channels, while the higher one corresponds to the usual superfluid-normal transition. We discuss how these phase transitions could be observed in ultracold gases of fermionic atoms.

Original language | English |
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Article number | 053606 |

Pages (from-to) | 1-6 |

Number of pages | 6 |

Journal | Physical Review A |

Volume | 73 |

Issue number | 5 |

DOIs | |

Publication status | Published - May 2006 |

MoE publication type | A1 Journal article-refereed |