Pseudogap effects of Fermi gases in the presence of a strong effective magnetic field

被引:4
作者
Scherpelz, Peter [1 ,2 ]
Dan Wulin [1 ,2 ]
Levin, K. [1 ,2 ]
Rajagopal, A. K. [3 ,4 ,5 ]
机构
[1] Univ Chicago, James Franck Inst, Chicago, IL 60637 USA
[2] Univ Chicago, Dept Phys, Chicago, IL 60637 USA
[3] Inspire Inst Inc, Alexandria, VA 22303 USA
[4] Harish Chandra Res Inst, Allahabad 211019, Uttar Pradesh, India
[5] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA
来源
PHYSICAL REVIEW A | 2013年 / 87卷 / 06期
基金
美国国家科学基金会;
关键词
EXCITATION SPECTRUM; II SUPERCONDUCTORS; FLUCTUATIONS; CONDENSATION; OSCILLATIONS; TEMPERATURE; CROSSOVER; STATES; BCS;
D O I
10.1103/PhysRevA.87.063602
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We address the important question of how to characterize the normal state and the nature of noncondensed pairs in fermionic superfluids under the influence of a strong effective magnetic field. In ultracold gases, the magnetic field is implemented through rapid rotation or novel artificial field techniques. We consider the near-unitary regime, where noncondensed pairs are likely to be present at temperatures above the condensation temperature T-c. We show (based on Gor'kov theory) that these pairs are associated with a precursor of a vortex configuration. Importantly, this nonuniform normal state appears to enable "Bose condensation" in a field which is otherwise problematic due to the effective one-dimensionality of Landau-level dispersion.
引用
收藏
页数:5
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