### Abstract

A formulation of QFT for BEC system in a trap is presented. The formulation can be extended straightforwardly to thermal field theory to include thermal fluctuation as well. The scheme is more fundamental than the mean-field approximation and the Bogoliubov approach.

Original language | English |
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Article number | 013609 |

Pages (from-to) | 013609/1-013609/12 |

Journal | Physical Review A - Atomic, Molecular, and Optical Physics |

Volume | 68 |

Issue number | 1 |

Publication status | Published - 2003 Jul |

### ASJC Scopus subject areas

- Atomic and Molecular Physics, and Optics

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## Cite this

Okumura, M., & Yamanaka, Y. (2003). Proper treatment of the zero mode in quantum field theory for trapped Bose-Einstein condensation.

*Physical Review A - Atomic, Molecular, and Optical Physics*,*68*(1), 013609/1-013609/12. [013609].