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

Makoto Mine, Tomoi Koide, Masahiko Okumura, Yoshiya Yamanaka

研究成果: Article

2 引用 (Scopus)

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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.

元の言語English
ページ(範囲)683-700
ページ数18
ジャーナルProgress of Theoretical Physics
115
発行部数4
DOI
出版物ステータスPublished - 2006 4 1

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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