Momentum-resolved spectroscopy of a Fermi liquid
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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2015
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en
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Scientific Reports, Volume 5, pp. 1-10
Abstract
We consider a recent momentum-resolved radio-frequency spectroscopy experiment, in which Fermi liquid properties of a strongly interacting atomic Fermi gas were studied. Here we show that by extending the Brueckner-Goldstone model, we can formulate a theory that goes beyond basic mean-field theories and that can be used for studying spectroscopies of dilute atomic gases in the strongly interacting regime. The model hosts well-defined quasiparticles and works across a wide range of temperatures and interaction strengths. The theory provides excellent qualitative agreement with the experiment. Comparing the predictions of the present theory with the mean-field Bardeen-Cooper-Schrieffer theory yields insights into the role of pair correlations, Tan's contact, and the Hartree mean-field energy shift.Description
Keywords
BCS-BEC crossover, Fermi liquid, Quantum gas, Tan contact
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Citation
Doggen, E V H & Kinnunen, J 2015, ' Momentum-resolved spectroscopy of a Fermi liquid ', Scientific Reports, vol. 5, 9539, pp. 1-10 . https://doi.org/10.1038/srep09539