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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概要

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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.

• 素粒子論グループ 素粒子研究編集部の論文
• 2002-04-20

著者

• 奥村 雅彦

  早大

• Yamanaka Y.

  Waseda University Senior High School

関連論文

• 場の量子論・熱場の量子論からみた中性原子気体Bose-Einstein凝縮およびその巨視的波動関数(基研研究会「熱場の量子論とその応用」,研究会報告)
• 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)
• Description of Bose-Einstein Condensation in a Harmonic Portential by Quantum Field Theory (熱湯の量子論とその応用)
• THE ROLE OF NAMBU-GOLDSTONE MODE IN TRAPPED BOSE-EINSTEIN CONDENSATES

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