Superfluid/ferromagnet/superfluid-junction and π-phase in a superfluid Fermi gas at finite temperatures

Takashi Kashimura, S. Tsuchiya, Y. Ohashi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We investigate the stability of π-phase in a polarized superfluid Fermi gas (N > N, where Nσ is the number of atoms in the hyperfine state described by pseudospin-σ). In our previous paper [T. Kashimura, S. Tsuchiya, and Y. Ohashi, Phys. Rev. A 82, 033617 (2010)], we showed that excess atoms (ΔN = N - N) localized around a potential barrier embedded in the system induces the π-phase at T = 0, where the phase of superfluid order parameter differ by π across the junction. In this paper, we extend our previous work to include temperature effects within the mean-field theory. We show that the π-phase is stable even at finite temperatures, although transition from the π-phase to 0-phase eventually occurs at a certain temperature. Our results indicate that the π-phase is experimentally accessible in cold Fermi gases.

Original languageEnglish
Title of host publicationProceedings of 2011 1st International Symposium on Access Spaces, ISAS 2011
Pages32-35
Number of pages4
DOIs
Publication statusPublished - 2011
Event2011 1st International Symposium on Access Spaces, ISAS 2011 - Yokohama, Japan
Duration: 2011 Jun 172011 Jun 19

Publication series

NameProceedings of 2011 1st International Symposium on Access Spaces, ISAS 2011

Other

Other2011 1st International Symposium on Access Spaces, ISAS 2011
Country/TerritoryJapan
CityYokohama
Period11/6/1711/6/19

Keywords

  • Fermi superfluid
  • cold Fermi gas
  • ferromagnet
  • magnetic junction
  • π-phase

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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