Bogoliubov theory and Lee-Huang-Yang corrections in spin-1 and spin-2 Bose-Einstein condensates in the presence of the quadratic Zeeman effect

Shun Uchino, Michikazu Kobayashi, Masahito Ueda

研究成果: Article査読

40 被引用数 (Scopus)

抄録

We develop Bogoliubov theory of spin-1 and spin-2 Bose-Einstein condensates (BECs) in the presence of a quadratic Zeeman effect, and derive the Lee-Huang-Yang (LHY) corrections to the ground-state energy, pressure, sound velocity, and quantum depletion. We investigate all the phases of spin-1 and spin-2 BECs that can be realized experimentally. We also examine the stability of each phase against quantum fluctuations and the quadratic Zeeman effect. Furthermore, we discuss a relationship between the number of symmetry generators that are spontaneously broken and that of Nambu-Goldstone (NG) modes. It is found that in the spin-2 nematic phase there are special Bogoliubov modes that have gapless linear dispersion relations but do not belong to the NG modes.

本文言語English
論文番号063632
ジャーナルPhysical Review A - Atomic, Molecular, and Optical Physics
81
6
DOI
出版ステータスPublished - 2010 6 25
外部発表はい

ASJC Scopus subject areas

  • 原子分子物理学および光学

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