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 language | English |
|---|---|
| Title of host publication | Proceedings of 2011 1st International Symposium on Access Spaces, ISAS 2011 |
| Pages | 32-35 |
| Number of pages | 4 |
| DOIs | |
| Publication status | Published - 2011 |
| Event | 2011 1st International Symposium on Access Spaces, ISAS 2011 - Yokohama, Japan Duration: 2011 Jun 17 → 2011 Jun 19 |
Other
| Other | 2011 1st International Symposium on Access Spaces, ISAS 2011 |
|---|---|
| Country | Japan |
| City | Yokohama |
| Period | 11/6/17 → 11/6/19 |
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Keywords
- π-phase
- cold Fermi gas
- Fermi superfluid
- ferromagnet
- magnetic junction
ASJC Scopus subject areas
- Computer Networks and Communications
- Electrical and Electronic Engineering
Cite this
Superfluid/ferromagnet/superfluid-junction and π-phase in a superfluid Fermi gas at finite temperatures. / Kashimura, Takashi; Tsuchiya, S.; Ohashi, Yoji.
Proceedings of 2011 1st International Symposium on Access Spaces, ISAS 2011. 2011. p. 32-35 5960916.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Superfluid/ferromagnet/superfluid-junction and π-phase in a superfluid Fermi gas at finite temperatures
AU - Kashimura, Takashi
AU - Tsuchiya, S.
AU - Ohashi, Yoji
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
KW - π-phase
KW - cold Fermi gas
KW - Fermi superfluid
KW - ferromagnet
KW - magnetic junction
UR - http://www.scopus.com/inward/record.url?scp=80051812537&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80051812537&partnerID=8YFLogxK
U2 - 10.1109/ISAS.2011.5960916
DO - 10.1109/ISAS.2011.5960916
M3 - Conference contribution
AN - SCOPUS:80051812537
SN - 9781457707179
SP - 32
EP - 35
BT - Proceedings of 2011 1st International Symposium on Access Spaces, ISAS 2011
ER -