Inelastic light scattering from a Mott insulator

Details Inelastic light scattering from a Mott insulator Inelastic light scattering from a Mott insulator

2004-05-20

arxiv.org/abs/cond-mat/0405492v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 7 figures, LaTeX, submitted to PRL

Scientific paper

10.1103/PhysRevA.71.021601

We propose to use Bragg spectroscopy to measure the excitation spectrum of the Mott insulator state of an atomic Bose gas in an optical lattice. We calculate the structure factor of the Mott insulator taking into account both the selfenergy corrections of the atoms and the corresponding dressing of the atom-photon interaction. We determine the scattering rate of photons in the stimulated Raman transition and show that by measuring this scattering rate in an experiment, in particular the excitation gap of the Mott insulator can be determined.

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