Pseudogap Pairing in Ultracold Fermi Atoms

Journal Article · Fri Jun 18 04:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.104.240407· OSTI ID:21410414

Hui, Hu; Xiaji, Liu; Drummond, Peter D ^[1]; Hui, Dong ^[1]

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1. 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, Journal Name: Physical Review Letters Journal Issue: 24 Vol. 104; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATOMS
BCS THEORY
BOSE-EINSTEIN CONDENSATION
CLUSTER EXPANSION
FERMI GAS
FUNCTIONS
HIGH-TC SUPERCONDUCTORS
INTERACTIONS
MANY-BODY PROBLEM
PAIRING INTERACTIONS
RF SYSTEMS
SERIES EXPANSION
SPECTRAL FUNCTIONS
SPECTROSCOPY
SUPERCONDUCTORS
TYPE-II SUPERCONDUCTORS