Comparative study of strong-coupling theories of a trapped Fermi gas at unitarity

被引：55

作者：

Hu, Hui ^{[1
,2
]}

Liu, Xia-Ji ^{[2
]}

Drummond, Peter D. ^{[2
]}

机构：

[1] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China

[2] Univ Queensland, Dept Phys, ARC Ctr Excellence Quantum Atom Opt, Brisbane, Qld 4072, Australia

来源：

PHYSICAL REVIEW A | 2008年 / 77卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.77.061605

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a systematic comparison of the most recent thermodynamic measurements of a trapped Fermi gas at unitarity with predictions from strong-coupling theories and quantum Monte Carlo (MC) simulations. The accuracy of the experimental data, of the order of a few percent, allows a precise test of different many-body approaches. We find that a Nozieres and Schmitt-Rink treatment of fluctuations is in excellent agreement with the experimental data and available MC calculations at unitarity.

引用

页数：4

共 36 条

[1] Pairing and superfluid properties of dilute fermion gases at unitarity [J].

Akkineni, Vamsi K. ;

Ceperley, D. M. ;

Trivedi, Nandini .

PHYSICAL REVIEW B, 2007, 76 (16)

[2] Spin 1/2 fermions in the unitary regime: A superfluid of a new type [J].

Bulgac, A ;

Drut, JE ;

Magierski, P .

PHYSICAL REVIEW LETTERS, 2006, 96 (09)

[3] Thermodynamics of a trapped unitary Fermi gas [J].

Bulgac, Aurel ;

Drut, Joaquin E. ;

Magierski, Piotr .

PHYSICAL REVIEW LETTERS, 2007, 99 (12)

[4] Critical temperature and thermodynamics of attractive fermions at unitarity [J].

Burovski, E ;

Prokof'ev, N ;

Svistunov, B ;

Troyer, M .

PHYSICAL REVIEW LETTERS, 2006, 96 (16)

[5] Self-consistent theory for molecular instabilities in a normal degenerate Fermi gas in the BEC-BCS crossover [J].

Combescot, R ;

Leyronas, X ;

Kagan, MY .

PHYSICAL REVIEW A, 2006, 73 (02)

[6] 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

[7] Quantum fluctuations in the superfluid state of the BCS-BEC crossover [J].

Diener, Roberto B. ;

Sensarma, Rajdeep ;

Randeria, Mohit .

PHYSICAL REVIEW A, 2008, 77 (02)

[8] BCS to Bose crossover: Broken-symmetry state [J].

Engelbrecht, JR ;

Randeria, M ;

deMelo, CARS .

PHYSICAL REVIEW B, 1997, 55 (22) :15153-15156

[9] Thermodynamics of the BCS-BEC crossover [J].

Haussmann, R. ;

Rantner, W. ;

Cerrito, S. ;

Zwerger, W. .

PHYSICAL REVIEW A, 2007, 75 (02)

[10] PROPERTIES OF A FERMI-LIQUID AT THE SUPERFLUID TRANSITION IN THE CROSSOVER REGION BETWEEN BCS SUPERCONDUCTIVITY AND BOSE-EINSTEIN CONDENSATION [J].

HAUSSMANN, R .

PHYSICAL REVIEW B, 1994, 49 (18) :12975-12983

← 1 2 3 4 →