Quasiparticles, coherence, and nonlinearity: Exact simulations of RF-spectroscopy of strongly interacting one-dimensional Fermi gases

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  • University of Jyväskylä


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 He3 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.


Original languageEnglish
Article number023602
Pages (from-to)1-4
Number of pages4
JournalPhysical Review A
Issue number2
Publication statusPublished - 1 Aug 2008
MoE publication typeA1 Journal article-refereed

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