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Dark continuum in the spectral function of the resonant Fermi polaron
KTH, School of Engineering Sciences (SCI), Theoretical Physics.
2016 (English)In: PHYSICAL REVIEW A, ISSN 2469-9926, Vol. 94, no 5, article id 051605Article in journal (Refereed) Published
Abstract [en]

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 wave vector, a less than or similar to 1/k(F), 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.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2016. Vol. 94, no 5, article id 051605
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:kth:diva-198566DOI: 10.1103/PhysRevA.94.051605ISI: 000388463900001Scopus ID: 2-s2.0-84999122137OAI: oai:DiVA.org:kth-198566DiVA, id: diva2:1057737
Funder
Stiftelsen Olle Engkvist Byggmästare
Note

QC 20161219

Available from: 2016-12-19 Created: 2016-12-19 Last updated: 2016-12-19Bibliographically approved

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