Equation of state of a superfluid Fermi gas in the BCS-BEC crossover

被引：167

作者：

Hu, H ^{[1
]}

Liu, XJ ^{[1
]}

Drummond, PD ^{[1
]}

机构：

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

来源：

EUROPHYSICS LETTERS | 2006年 / 74卷 / 04期

关键词：

D O I：

10.1209/epl/i2006-10023-y

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a theory for a superfluid Fermi gas near the BCS-BEC crossover, including pairing fluctuation contributions to the free energy similar to that considered by Nozieres and Schmitt-Rink for the normal phase. In the strong coupling limit, our theory is able to recover the Bogoliubov theory of a weakly interacting Bose gas with a molecular scattering length very close to the known exact result. We compare our results with recent Quantum Monte Carlo simulations both for the ground state and at finite temperature. Excellent agreement is found for all interaction strengths where simulation results are available.

引用

页码：574 / 580

页数：7

共 39 条

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