Bogoliubov theory of Feshbach molecules in the BEC-BCS crossover

被引：10
|
作者：
Romans, M. W. J. [1 ]
Stoof, H. T. C. [1 ]
机构：
[1] Univ Utrecht, Inst Theoret Phys, NL-3584 CE Utrecht, Netherlands
来源：
PHYSICAL REVIEW A | 2006年 / 74卷 / 05期
关键词：
D O I：
10.1103/PhysRevA.74.053618
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present the Bogoliubov theory for the Bose-Einstein condensation of Feshbach molecules in a balanced Fermi mixture. Because the Bogoliubov theory includes (Gaussian) fluctuations, we can in this manner accurately incorporate both the two-body and many-body aspects of the BEC-BCS crossover that occurs near a Feshbach resonance. We apply the theory in particular to the very broad Feshbach resonance in atomic Li-6 at a magnetic field of B-0=834 G and find good agreement with experiments in that case. The BEC-BCS crossover for more narrow Feshbach resonances is also discussed.
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页数：15
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