Probing quasi-particle states in strongly interacting atomic gases by momentum-resolved Raman photoemission spectroscopy

Details Probing quasi-particle states in strongly interacting atomic gases by momentum-resolved Raman photoemission spectroscopy Probing quasi-particle states in strongly interacting atomic gases by momentum-resolved Raman photoemission spectroscopy

2009-05-06

arxiv.org/abs/0905.0824v1

Phys. Rev. A 80, 023627 (2009)

Physics

Condensed Matter

Quantum Gases

10 pages, 10 figures

Scientific paper

10.1103/PhysRevA.80.023627

We investigate a momentum-resolved Raman spectroscopy technique which is able to probe the one-body spectral function and the quasi-particle states of a gas of strongly interacting ultracold atoms. This technique is inspired by Angle-Resolved Photo-Emission Spectroscopy, a powerful experimental probe of electronic states in solid-state systems. Quantitative examples of experimentally accessible spectra are given for the most significant regimes along the BEC-BCS crossover. When the theory is specialized to RF spectroscopy, agreement is found with recent experimental data. The main advantages of this Raman spectroscopy over existing techniques are pointed out.

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