トラップ中のBose-Einstein凝縮における南部-Goldstoneモードの解析(熱場の量子論とその応用,研究会報告)

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タイトル別名
  • THE ANALYSIS OF NAMBU-GOLDSTONE MODE IN TRAPPED BOSE-EINSTEIN CONDENSATES
  • Analysis of Nambu Goldstone Mode in Trapped Bose Einstein condensates

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We analyze the Nambu-Goldstone (NG) mode for a system of trapped Bose-Einstein condensation (BEC). The NG mode is a discrete mode in our case, contrary to the homogeneous case in which the NG mode is in a continuum labeled by a momentum index. In order to control the NG mode, an infinitesimal symmetry-breaking term is introduced. This breaking term plays the role of infinitesimal magnetic field in spin system which fixes the macroscopic "direction" of spin. We calculate a tadpole diagram to evaluate fluctuation effects, taking account of the NG mode, then find that the coefficient of the wave function of condensation is infrared divergent while the remaining terms are finite.

収録刊行物

  • 素粒子論研究

    素粒子論研究 105 (1), A89-A91, 2002

    素粒子論グループ 素粒子論研究 編集部

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