BEC-BCS crossover and universal relations in unitary Fermi gases

被引：65

作者：

Gandolfi, S. ^{[1
]}

Schmidt, K. E. ^{[2
]}

Carlson, J. ^{[2
]}

机构：

[1] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

[2] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA

来源：

PHYSICAL REVIEW A | 2011年 / 83卷 / 04期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevA.83.041601

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The contact parameter in unitary Fermi gases governs the short-range correlations and high-momentum properties of the system. We perform accurate quantum Monte Carlo calculations with highly optimized trial functions to precisely determine this parameter at T = 0, demonstrate its universal application to a variety of observables, and determine the regions of momentum and energy over which the leading short-range behavior is dominant. We derive Tan's expressions for the contact parameter using just the short-range behavior of the ground-state many-body wave function, and use this behavior to calculate the two-body distribution function, one-body density matrix, and the momentum distribution of unitary Fermi gases; providing a precise value of the contact parameter that can be compared to experiments.

引用

页数：4

共 50 条

[1] Ultracold Fermi gases: The BEC-BCS crossover
Combescot, Roland
[J]. JOURNAL OF LOW TEMPERATURE PHYSICS, 2006, 145 (1-4) : 267 - 276
[2] Ultracold Fermi Gases : The BEC-BCS Crossover
Roland Combescot
[J]. Journal of Low Temperature Physics, 2006, 145 : 267 - 276
[3] FERMIONIC SUPERFLUIDITY AND THE BEC-BCS CROSSOVER IN ULTRACOLD ATOMIC FERMI GASES
Zwierlein, M. W.
[J]. PROCEEDINGS OF THE 9TH INTERNATIONAL SYMPOSIUM ON FOUNDATIONS OF QUANTUM MECHANICS IN THE LIGHT OF NEW TECHNOLOGY, 2009, : 24 - 32
[4] Collective mode of homogeneous superfluid Fermi gases in the BEC-BCS crossover
Combescot, R.
Kagan, M. Yu.
Stringari, S.
[J]. PHYSICAL REVIEW A, 2006, 74 (04):
[5] Universal correlations along the BEC-BCS crossover
Obeso-Jureidini, J. C.
Dominguez-Castro, G. A.
Neri, E.
Paredes, R.
Romero-Rochin, V
[J]. NEW JOURNAL OF PHYSICS, 2023, 25 (11):
[6] Induced interaction in a Fermi gas with a BEC-BCS crossover
Yu, Zeng-Qiang
Huang, Kun
Yin, Lan
[J]. PHYSICAL REVIEW A, 2009, 79 (05):
[7] Inelastic Collisions of a Fermi Gas in the BEC-BCS Crossover
Du, X.
Zhang, Y.
Thomas, J. E.
[J]. PHYSICAL REVIEW LETTERS, 2009, 102 (25)
[8] The BEC-BCS crossover in ultracold Fermi gases beyond the contact-potential approximation
Garberoglio, Giovanni
Taioli, Simone
Simonucci, Stefano
[J]. EUROPEAN PHYSICAL JOURNAL D, 2013, 67 (06):
[9] Collective modes of trapped gases at the BEC-BCS crossover
Heiselberg, H
[J]. PHYSICAL REVIEW LETTERS, 2004, 93 (04) : 040402 - 1
[10] The BEC-BCS crossover in ultracold Fermi gases beyond the contact-potential approximation
Giovanni Garberoglio
Simone Taioli
Stefano Simonucci
[J]. The European Physical Journal D, 2013, 67

← 1 2 3 4 5 →