Inelastic light scattering from a Mott insulator

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Inelastic light scattering from a Mott insulator

D. van Oosten, D. B. M. Dickerscheid, B. Farid, P. van der Straten, and H. T. C. Stoof

Phys. Rev. A 71, 021601(R) – Published 1 February 2005

Abstract

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 self-energy 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.

Received 20 May 2004

DOI:https://doi.org/10.1103/PhysRevA.71.021601

Authors & Affiliations

D. van Oosten^1,2, D. B. M. Dickerscheid^1,3, B. Farid¹, P. van der Straten², and H. T. C. Stoof¹

¹Institute for Theoretical Physics, University of Utrecht, Leuvenlaan 4, 3584 CE Utrecht, The Netherlands
²Debye Institute, University of Utrecht, Princetonplein 5, 3584 CC Utrecht, The Netherlands
³Lorentz Institute, Leiden University, P.O. Box 9506, 2300 RA Leiden, The Netherlands

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Issue

Vol. 71, Iss. 2 — February 2005

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