Pseudogap Pairing in Ultracold Fermi Atoms
- ARC Centre of Excellence for Quantum-Atom Optics and Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, Melbourne 3122 (Australia)
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{sub 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.
- OSTI ID:
- 21410414
- Journal Information:
- Physical Review Letters, Vol. 104, Issue 24; Other Information: DOI: 10.1103/PhysRevLett.104.240407; (c) 2010 The American Physical Society; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATOMS
BCS THEORY
BOSE-EINSTEIN CONDENSATION
CLUSTER EXPANSION
FERMI GAS
HIGH-TC SUPERCONDUCTORS
MANY-BODY PROBLEM
PAIRING INTERACTIONS
RF SYSTEMS
SPECTRAL FUNCTIONS
SPECTROSCOPY
FUNCTIONS
INTERACTIONS
SERIES EXPANSION
SUPERCONDUCTORS
TYPE-II SUPERCONDUCTORS