## 抄録

The non-Markovian transport equations for the systems of cold Bose atoms confined by a external potential both without and with a Bose-Einstein condensate are derived in the framework of nonequilibrium thermal field theory (Thermo Field Dynamics). Our key elements are an explicit particle representation and a self-consistent renormalization condition which are essential in thermal field theory. The non-Markovian transport equation for the non-condensed system, derived at the two-loop level, is reduced in the Markovian limit to the ordinary quantum Boltzmann equation derived in the other methods. For the condensed system, we derive a new transport equation with an additional collision term which becomes important in the Landau instability.

本文言語 | English |
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ページ（範囲） | 426-441 |

ページ数 | 16 |

ジャーナル | Annals of Physics |

巻 | 325 |

号 | 2 |

DOI | |

出版ステータス | Published - 2010 2 1 |

## ASJC Scopus subject areas

- Physics and Astronomy(all)