Measuring the one-particle excitations of ultracold fermionic atoms by stimulated Raman spectroscopy

Year: 2007

Authors: Dao T.L., Georges A., Dalibard J., Salomon C., Carusotto I.

Autors Affiliation: Centre de Physique The´orique, CNRS, Ecole Polytechnique, Route de Saclay, 91128 Palaiseau Cedex, France;
Laboratoire Kastler-Brossel, CNRS, Ecole Normale Supe´rieure, 24, rue Lhomond, 75231 Paris Cedex 05, France;
CNR-INFM BEC Center and Universita` di Trento, 38050 Povo, Italy;

Abstract: 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.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 98 (24)      Pages from: 240402-1  to: 240402-4

KeyWords: Fermi gas; stimulated Raman spectroscopy; strongly correlated; photoemission spectroscopy;
DOI: 10.1103/PhysRevLett.98.240402

Citations: 96
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