Spectroscopic Bogoliubov features near the unitary limit

Details Spectroscopic Bogoliubov features near the unitary limit Spectroscopic Bogoliubov features near the unitary limit

2011-02-07

arxiv.org/abs/1102.1243v1

Phys. Rev. A 84, 023634 (2011)

Physics

Condensed Matter

Superconductivity

4 pages + epsilon

Scientific paper

10.1103/PhysRevA.84.023634

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 Tc. We consider the short-range correlations originating from the preformed pairs and try to reproduce the experimental data adapting phenomenological selfenergy previously used for description of the anti-nodal spectra of the underdoped cuprate superconductors. We show that it fairly fits the lineshapes obtained by the momentum resolved RF spectroscopy for {40}^K atoms.

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