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

Takashi Kashimura, Shunji Tsuchiya, Yoji Ohashi

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Article number012027
JournalJournal of Physics: Conference Series
Volume400
Issue numberPART 1
DOIs
Publication statusPublished - 2012

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gases
traps
metastable state
atoms

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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π-phase and Spontaneous Supercurrent induced by Pseudo-ferromagnetic junction in a spin-polarized superfluid Fermi gas. / Kashimura, Takashi; Tsuchiya, Shunji; Ohashi, Yoji.

In: Journal of Physics: Conference Series, Vol. 400, No. PART 1, 012027, 2012.

Research output: Contribution to journalArticle

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