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Thermometry and signatures of strong correlations from Raman spectroscopy of fermionic atoms in optical lattices

Abstract : A method is proposed to directly measure the temperature of a gas of weakly interacting fermionic atoms loaded into an optical lattice. This technique relies on Raman spectroscopy and is applicable to experimentally relevant temperature regimes. Additionally, a similar spectroscopy scheme can be used to obtain information on the quasiparticle properties and Hubbard bands of the metallic and Mott-insulating states of interacting fermionic spin mixtures. These two methods provide experimentalists with probes to accurately characterize fermionic quantum gases confined to optical lattices
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Jean-Sebastien Bernier, Tung-Lam Dao, Corinna Kollath, Antoine Georges, Pablo Cornaglia. Thermometry and signatures of strong correlations from Raman spectroscopy of fermionic atoms in optical lattices. Physical Review A, American Physical Society, 2010, 81 (6), pp.063618. ⟨10.1103/PhysRevA.81.063618⟩. ⟨hal-00746829⟩

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