Pseudogap Pairing in Ultracold Fermi Atoms

被引：68

作者：

Hu, Hui ^{[1
,2
]}

Liu, Xia-Ji ^{[1
,2
]}

Drummond, Peter D. ^{[1
,2
]}

Dong, Hui ^{[1
,2
,3
]}

机构：

[1] Swinburne Univ Technol, ARC Ctr Excellence Quantum Atom Opt, Melbourne, Vic 3122, Australia

[2] Swinburne Univ Technol, Ctr Atom Opt & Ultrafast Spect, Melbourne, Vic 3122, Australia

[3] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 24期

关键词：

STATE; THERMODYNAMICS; GAP;

D O I：

10.1103/PhysRevLett.104.240407

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Bose-Einstein condensate to Bardeen-Cooper-Schrieffer crossover in ultracold Fermi gases creates an ideal environment to enrich our knowledge of many-body systems. It is relevant to a wide range of fields from condensed matter to astrophysics. The nature of pairing in strongly interacting Fermi gases can be readily studied. This aids our understanding of related problems in high-T-c superconductors, whose mechanism is still under debate due to the large interaction parameter. Here, we calculate the dynamical properties of a normal, trapped strongly correlated Fermi gas, by developing a quantum cluster expansion. Our calculations for the single-particle spectral function agree with recent rf spectroscopy measurements, and clearly demonstrate pseudogap pairing in the strongly interacting regime.

引用

页数：4

共 31 条

[1] Bragg spectroscopy of cold atomic Fermi gases [J].