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RESEARCH PRODUCT
Beyond linear response spectroscopy of ultracold fermi gases.
Jami J. KinnunenPäivi TörmäPäivi Törmäsubject
PhysicsStrongly Correlated Electrons (cond-mat.str-el)Statistical Mechanics (cond-mat.stat-mech)Condensed Matter - SuperconductivityFOS: Physical sciencesGeneral Physics and AstronomyFermion01 natural sciences010305 fluids & plasmasSuperconductivity (cond-mat.supr-con)Condensed Matter - Strongly Correlated ElectronsMean field theoryQuantum electrodynamicsPairing0103 physical sciencesSpin-flipPerturbation theory010306 general physicsFermi gasSpectroscopyCondensed Matter - Statistical MechanicsFermi Gamma-ray Space Telescopedescription
We study RF-spectroscopy of ultracold Fermi gas by going beyond the linear response in the field-matter interaction. Higher order perturbation theory allows virtual processes and energy conservation beyond the single particle level. We formulate an effective higher order theory which agrees quantitatively with experiments on the pairing gap, and is consistent with the absence of the mean-field shift in the spin-flip experiment.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-07-11 | Physical review letters |