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Selected Works of Olga Goulko
Article
Dark Continuum in the Spectral Function of the Resonant Fermi Polaron
Physical Review A (2016)
  • Olga Goulko, University of Massachusetts Amherst
  • Andrey S. Mishchenko, RIKEN Center for Emergent Matter Science (CEMS)
  • Nikolay Prokof'ev, University of Massachusetts Amherst
  • Boris Svistunov, University of Massachusetts - Amherst
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Abstract
We present controlled numerical results for the ground state spectral function of the resonant Fermi polaron in three dimensions. We establish the existence of a "dark continuum"---a region of anomalously low spectral weight between the narrow polaron peak and the rest of the spectral continuum. The dark continuum develops when the s-wave scattering length is of the order of the inverse Fermi wavevector, a≲1/kF, i.e. in the absence of a small interaction-related parameter when the spectral weight is not expected to feature a near-perfect gap structure after the polaron peak.
Keywords
  • Fermi polaron,
  • spectral function,
  • Quantum Monte Carlo,
  • ultracold atoms
Disciplines
Publication Date
November, 2016
DOI
10.1103/PhysRevA.94.051605
Citation Information
Olga Goulko, Andrey S. Mishchenko, Nikolay Prokof'ev and Boris Svistunov. "Dark Continuum in the Spectral Function of the Resonant Fermi Polaron" Physical Review A Vol. 94 Iss. 5 (2016) p. 051605
Available at: http://works.bepress.com/olga-goulko/9/