Measuring the one-particle excitations of ultracold fermionic atoms by stimulated Raman spectroscopy.
We propose a Raman spectroscopy technique which is able to probe the one-particle Green function, the Fermi surface, and the quasiparticles of a gas of strongly interacting ultracold atoms. We give quantitative examples of experimentally accessible spectra. The efficiency of the method is validated by means of simulated images for the case of a usual Fermi liquid as well as for more exotic states: specific signatures of, e.g., a d-wave pseudogap are clearly visible.
Centre de Physique Théorique, CNRS, Ecole Polytechnique, Route de Saclay, 91128 Palaiseau Cedex, France.
Tung-Lam
TL
Dao
Antoine
A
Georges
Jean
J
Dalibard
Christophe
C
Salomon
Iacopo
I
Carusotto