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

Jean-Sebastien Bernier (1) , Tung-Lam Dao (2) , Corinna Kollath (1) , Antoine Georges (1, 3) , Pablo Cornaglia (4)

1 CPHT - Centre de Physique Théorique [Palaiseau]
2 laboratoire Charles Fabry de l'Institut d'Optique / Optique atomique
3 Collège de France - Chaire Physique de la matière condensée (A. Georges)
4 Centro Atómico Bariloche [Argentine]

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

Domains: Optics [physics.optics]

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 : Atomic, molecular, and optical physics [1990-2015], 2010, 81 (6), pp.063618. ⟨10.1103/PhysRevA.81.063618⟩. ⟨hal-00746829⟩