Probing quasi-particle states in strongly interacting atomic gases by momentum-resolved Raman photoemission spectroscopy
arXiv:0905.0824 · doi:10.1103/PhysRevA.80.023627
Abstract
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.
10 pages, 10 figures
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- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
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- Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
- Using photoemission spectroscopy to probe a strongly interacting Fermi gas
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- Trapping and cooling fermionic atoms into the Mott and Néel states
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- Excitation spectra of strongly interacting bosons in the flat-band Lieb lattice
- Exact spectral function of the Tonks-Girardeau gas at finite temperature