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 Aug 23
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
CountryJapan
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

Fingerprint Dive into the research topics of 'Superfluid/ferromagnet/superfluid-junction and π-phase in a superfluid Fermi gas at finite temperatures'. Together they form a unique fingerprint.

  • Cite this

    Kashimura, T., Tsuchiya, S., & Ohashi, Y. (2011). Superfluid/ferromagnet/superfluid-junction and π-phase in a superfluid Fermi gas at finite temperatures. In Proceedings of 2011 1st International Symposium on Access Spaces, ISAS 2011 (pp. 32-35). [5960916] (Proceedings of 2011 1st International Symposium on Access Spaces, ISAS 2011). https://doi.org/10.1109/ISAS.2011.5960916