Transversal laser excitation of atoms in a waveguide
  We investigate the effect of a laser shining perpendicularly to a waveguide channeling two-level atoms. For weak transversal coupling the excitation of transverse atomic levels occurs at avoided crossings associated with "Rabi resonances" in which the Rabi frequency coincides with the transition frequency between the transverse levels. 
I. Lizuain, A. Ruschhaupt, J. G. Muga