Evolution of the Normal State of a Strongly Interacting Fermi Gas from a Pseudogap Phase to a Molecular Bose Gas

被引：102

作者：

Perali, A. ^{[1
]}

Palestini, F. ^{[1
]}

Pieri, P. ^{[1
]}

Strinati, G. C. ^{[1
]}

Stewart, J. T. ^{[2
,3
]}

Gaebler, J. P. ^{[2
,3
]}

Drake, T. E. ^{[2
,3
]}

Jin, D. S. ^{[2
,3
]}

机构：

[1] Univ Camerino, Dipartimento Fis, I-62032 Camerino, Italy

[2] NIST, JILA, Boulder, CO 80309 USA

[3] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 06期

关键词：

SURFACE;

D O I：

10.1103/PhysRevLett.106.060402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Wave-vector resolved radio frequency spectroscopy data for an ultracold trapped Fermi gas are reported for several couplings at T-c, and extensively analyzed in terms of a pairing-fluctuation theory. We map the evolution of a strongly interacting Fermi gas from the pseudogap phase into a fully gapped molecular Bose gas as a function of the interaction strength, which is marked by a rapid disappearance of a remnant Fermi surface in the single-particle dispersion. We also show that our theory of a pseudogap phase is consistent with a recent experimental observation as well as with quantum Monte Carlo data of thermodynamic quantities of a unitary Fermi gas above T-c.

引用

页数：4

共 22 条

[1] Spin 1/2 fermions in the unitary regime: A superfluid of a new type [J].