π-phase and Spontaneous Supercurrent induced by Pseudo-ferromagnetic junction in a spin-polarized superfluid Fermi gas

Takashi Kashimura, Shunji Tsuchiya, Yoji Ohashi

研究成果: Conference article査読

抄録

We theoretically investigate a possible spontaneous current state in a polarized superfluid Fermi gas confined in a toroidal trap. When one puts a weak nonmagnetic potential barrier in this system, this barrier is known to be magnetized in the sense that some of excess ↑-spin atoms are localized around it (where the ↑-spin describes the majority component of the polarized Fermi gas). Using this unique property, we show that this magnetized barrier, or the pseudo-ferromagnetic junction, induces a spontaneous current circulating along the toroidal trap. While the ordinary supercurrent state appears as a metastable state, this spontaneous current state is realized as the most stable state, originating from the phase twist of the superfluid order parameter by the magnetized potential barrier.

本文言語English
論文番号012027
ジャーナルJournal of Physics: Conference Series
400
PART 1
DOI
出版ステータスPublished - 2012 1月 1
イベント26th International Conference on Low Temperature Physics, LT 2011 - Beijing, China
継続期間: 2011 8月 102011 8月 17

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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