Spectroscopic Bogoliubov features near the unitary limit

Journal Article · Mon Aug 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.023634· OSTI ID:22068538

Domanski, T ^[1]

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1. Institute of Physics, M. Curie-Sklodowska University, PL-20-031 Lublin (Poland)

We analyze the single-particle excitation spectrum of the ultracold fermion atom system close to the unitary limit where there has been found experimental evidence for the Bogoliubov quasiparticles below as well as above the transition temperature T{sub c}. We consider the short-range correlations originating from the preformed pairs and try to discuss the experimental data adapting phenomenological self-energy previously used for description of the antinodal spectra of the underdoped cuprate superconductors. We show that this ansatz qualitatively accounts for the momentum-resolved rf spectroscopic data obtained for {sup 40}K atoms.

• OSTI ID: 22068538
• Journal Information: Physical Review. A, Vol. 84, Issue 2; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMS
CORRELATIONS
EXCITATION
FERMIONS
POTASSIUM 40
QUASI PARTICLES
SELF-ENERGY
SPECTRA
SUPERCONDUCTORS
TRANSITION TEMPERATURE