English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
  Local TagsRelease HistoryDetailsSummary

Released
Journal Article

Interacting preformed Cooper pairs in resonant Fermi gases

MPS-Authors
/persons/resource/persons21581

Gubbels,  Koos
Molecular Physics, Fritz Haber Institute, Max Planck Society;
Radboud University Nijmegen, Institute for Molecules and Materials;
Institute for Theoretical Physics, Utrecht University;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)

e013610.pdf
(Publisher version), 292KB

preformedCP.pdf
(Any fulltext), 243KB

Supplementary Material (public)
There is no public supplementary material available
Citation

Gubbels, K., & Stoof, H. T. C. (2011). Interacting preformed Cooper pairs in resonant Fermi gases. Physical Review A, 84(1): 013610. doi:10.1103/PhysRevA.84.013610.


Cite as: https://hdl.handle.net/11858/00-001M-0000-000F-3D5B-4
Abstract
We consider the normal phase of a strongly interacting Fermi gas, which can have either an equal or an unequal number of atoms in its two accessible spin states. Due to the unitarity-limited attractive interaction between particles with different spin, noncondensed Cooper pairs are formed. The starting point in treating preformed pairs is the Nozières-Schmitt-Rink (NSR) theory, which approximates the pairs as being noninteracting. Here, we consider the effects of the interactions between the Cooper pairs in a Wilsonian renormalization-group scheme. Starting from the exact bosonic action for the pairs, we calculate the Cooper-pair self-energy by combining the NSR formalism with the Wilsonian approach. We compare our findings with the recent experiments by Harikoshi et al. Science 327 442 (2010)] and Nascimbène et al. Nature (London) 463 1057 (2010)], and find very good agreement. We also make predictions for the population-imbalanced case, which can be tested in experiments.