6533b7defe1ef96bd12767a8
RESEARCH PRODUCT
Quasiparticles, coherence and nonlinearity: exact simulations of RF-spectroscopy of strongly interacting one-dimensional Fermi gases
M. J. LeskinenJ. KajalaPäivi TörmäV. Apajasubject
PhysicsCondensed Matter::Quantum GasesQuantum decoherenceCondensed matter physicsCondensed Matter - SuperconductivityFOS: Physical sciencesAtomic and Molecular Physics and OpticsSuperfluiditySuperconductivity (cond-mat.supr-con)Condensed Matter - Other Condensed MatterQuantum statePairingQuantum mechanicsQuasiparticleSum rule in quantum mechanicsSpectroscopyCoherence (physics)Other Condensed Matter (cond-mat.other)description
We consider RF-spectroscopy of ultracold Fermi gases by exact simulations of the many-body state and the coherent dynamics in one dimension. Deviations from the linear response sum rule result are found to suppress the pairing contribution to the RF line shifts. We compare the coherent rotation and quasiparticle descriptions of RF-spectroscopy which are analogous to NMR experiments in superfluid $^3$He and tunneling in solids, respectively. We suggest that RF-spectroscopy in ultracold gases provides an interesting crossover between these descriptions that could be used for studying decoherence in quantum measurement, in the context of many-body quantum states.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-08-01 |