Precision measurements of collective oscillations in the BEC-BCS crossover

被引：203

作者：

Altmeyer, A. ^{[1
]}

Riedl, S.

Kohstall, C.

Wright, M. J.

Geursen, R.

Bartenstein, M.

Chin, C.

Denschlag, J. Hecker

Grimm, R.

机构：

[1] Univ Innsbruck, Inst Expt Phys, A-6020 Innsbruck, Austria

[2] Univ Innsbruck, Ctr Quantum Phys, A-6020 Innsbruck, Austria

[3] Austrian Acad Sci, Inst Quantum Opt & Quantum Informat, A-6020 Innsbruck, Austria

[4] Univ Chicago, Dept Phys, James Franck Inst, Chicago, IL 60637 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 04期

关键词：

INTERACTING FERMI GAS; BOSE; SUPERCONDUCTIVITY; CONDENSATION;

D O I：

10.1103/PhysRevLett.98.040401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on precision measurements of the frequency of the radial compression mode in a strongly interacting, optically trapped Fermi gas of Li-6 atoms. Our results allow for a test of theoretical predictions for the equation of state in the BEC-BCS crossover. We confirm recent quantum Monte Carlo results and rule out simple mean-field BCS theory. Our results show the long-sought beyond-mean-field effects in the strongly interacting Bose-Einstein condensation (BEC) regime.

引用

页数：4

共 39 条

[21] Time-dependent density-functional theory for trapped strongly interacting fermionic atoms [J].

Kim, YE ;

Zubarev, AL .

PHYSICAL REVIEW A, 2004, 70 (03) :033612-1

[22] Breakdown of hydrodynamics in the radial breathing mode of a strongly interacting Fermi gas [J].

Kinast, J ;

Turlapov, A ;

Thomas, JE .

PHYSICAL REVIEW A, 2004, 70 (05) :051401-1

[23] Damping of a unitary Fermi gas [J].

Kinast, J ;

Turlapov, A ;

Thomas, JE .

PHYSICAL REVIEW LETTERS, 2005, 94 (17)

[24] 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

[25]

Kinast J. M., 2006, THESIS DUKE U

[26] MANY-BODY PROBLEM IN QUANTUM MECHANICS AND QUANTUM STATISTICAL MECHANICS [J].

LEE, TD ;

YANG, CN .

PHYSICAL REVIEW, 1957, 105 (03) :1119-1120

[27] EIGENVALUES AND EIGENFUNCTIONS OF A BOSE SYSTEM OF HARD SPHERES AND ITS LOW-TEMPERATURE PROPERTIES [J].

LEE, TD ;

HUANG, K ;

YANG, CN .

PHYSICAL REVIEW, 1957, 106 (06) :1135-1145

[28] Bulk and collective properties of a dilute Fermi gas in the BCS-BEC crossover [J].

Manini, N ;

Salasnich, L .

PHYSICAL REVIEW A, 2005, 71 (03)

[29] 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

[30] Observation of a strongly interacting degenerate Fermi gas of atoms [J].

O'Hara, KM ;

Hemmer, SL ;

Gehm, ME ;

Granade, SR ;

Thomas, JE .

SCIENCE, 2002, 298 (5601) :2179-2182

← 1 2 3 4 →