Fermion superfluids of nonzero orbital angular momentum near resonance

被引：98

作者：

Ho, TL ^{[1
]}

Diener, RB ^{[1
]}

机构：

[1] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.94.090402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the pairing of Fermi gases near the scattering resonance of the l not equal 0 partial wave. Using a model potential which reproduces the actual two-body low energy scattering amplitude, we have obtained an analytic solution of the gap equation. We show that the ground state of l = 1 and l = 3 superfluids are orbital ferromagnets with pairing wave functions Y-11 and Y-32, respectively. For l = 2, there is a degeneracy between Y-22 and a "cyclic state." Dipole energy will orient the angular momentum axis. The gap function can be determined by the angular dependence of the momentum distribution of the fermions.

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相关论文

共 16 条

[1] Collective excitations of a degenerate gas at the BEC-BCS crossover [J].

Bartenstein, M ;

Altmeyer, A ;

Riedl, S ;

Jochim, S ;

Chin, C ;

Denschlag, JH ;

Grimm, R .

PHYSICAL REVIEW LETTERS, 2004, 92 (20) :203201-1

[2] Measurement of the interaction energy near a feshbach resonance in a 6Li Fermi gas -: art. no. 020402 [J].

Bourdel, T ;

Cubizolles, J ;

Khaykovich, L ;

Magalhaes, KMF ;

Kokkelmans, SJJMF ;

Shlyapnikov, GV ;

Salomon, C .

PHYSICAL REVIEW LETTERS, 2003, 91 (02)

[3] CROSSOVER FROM BCS TO BOSE SUPERCONDUCTIVITY - TRANSITION-TEMPERATURE AND TIME-DEPENDENT GINZBURG-LANDAU THEORY [J].

DEMELO, CARS ;

RANDERIA, M ;

ENGELBRECHT, JR .

PHYSICAL REVIEW LETTERS, 1993, 71 (19) :3202-3205

[4] Mechanical stability of a strongly interacting Fermi gas of atoms [J].

Gehm, ME ;

Hemmer, SL ;

Granade, SR ;

O'Hara, KM ;

Thomas, JE .

PHYSICAL REVIEW A, 2003, 68 (01) :4

[5]

HO TL, CONDMAT2004

[6] Evidence for superfluidity in a resonantly interacting Fermi gas [J].

Kinast, J ;

Hemmer, SL ;

Gehm, ME ;

Turlapov, A ;

Thomas, JE .

PHYSICAL REVIEW LETTERS, 2004, 92 (15) :150402-1

[7]

LANDAU LD, 1994, QUANTUM MECH, P556

[8] D-WAVE PAIRING NEAR TRANSITION-TEMPERATURE [J].

MERMIN, ND .

PHYSICAL REVIEW A, 1974, 9 (02) :868-872

[9] F-WAVE PAIRING OF PARALLEL SPINS NEAR TRANSITION-TEMPERATURE [J].

MERMIN, ND .

PHYSICAL REVIEW B, 1976, 13 (01) :112-120

[10] BOSE CONDENSATION IN AN ATTRACTIVE FERMION GAS - FROM WEAK TO STRONG COUPLING SUPERCONDUCTIVITY [J].

NOZIERES, P ;

SCHMITTRINK, S .

JOURNAL OF LOW TEMPERATURE PHYSICS, 1985, 59 (3-4) :195-211