6533b839fe1ef96bd12a5afd
RESEARCH PRODUCT
Pairing gap and in-gap excitations in trapped fermionic superfluids
M. RodriguezPäivi TörmäJami J. Kinnunensubject
FOS: Physical sciencesRoton01 natural sciences010305 fluids & plasmasSuperfluiditySuperconductivity (cond-mat.supr-con)Condensed Matter - Strongly Correlated ElectronsSuperfluid state0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)Physics::Atomic Physics010306 general physicsFeshbach resonanceSpectroscopyCondensed Matter - Statistical MechanicsPhysicsCondensed Matter::Quantum GasesQuantum PhysicsMultidisciplinaryCondensed Matter - Mesoscale and Nanoscale PhysicsCondensed matter physicsStatistical Mechanics (cond-mat.stat-mech)Strongly Correlated Electrons (cond-mat.str-el)Condensed Matter::OtherCondensed Matter - SuperconductivityPairingPseudogapQuantum Physics (quant-ph)Fermi Gamma-ray Space Telescopedescription
We consider trapped atomic Fermi gases with Feshbach-resonance enhanced interactions in pseudogap and superfluid temperatures. We calculate the spectrum of RF(or laser)-excitations for transitions that transfer atoms out of the superfluid state. The spectrum displays the pairing gap and also the contribution of unpaired atoms, i.e. in-gap excitations. The results support the conclusion that a superfluid, where pairing is a many-body effect, was observed in recent experiments on RF spectroscopy of the pairing gap.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-05-27 |