Effect of the zero-mode on the response of a trapped bose-condensed gas

Makoto Mine*, Tomoi Koide, Masahiko Okumura, Yoshiya Yamanaka

*この研究の対応する著者

研究成果: Article査読

2 被引用数 (Scopus)

抄録

The dynamical response of a trapped Bose-Einstein condensate (BEC) is formulated consistently with quantum field theory and is numerically evaluated. We regard the BEC as a manifestation of the breaking of the global phase symmetry. Then, the Goldstone theorem implies the existence of a zero energy excitation mode (the zero-mode). We calculate the effect of the zero-mode on the response frequency and show that the contribution of the zero-mode to the first excitation mode is not so important in the parameter set realized in the existing experiment. This is the reason that experimental results can be described using the Bogoliubov prescription, although it breaks the consistency of the description in quantum field theory.

本文言語English
ページ(範囲)683-700
ページ数18
ジャーナルProgress of Theoretical Physics
115
4
DOI
出版ステータスPublished - 2006 4月

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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