An effective thermal-parametrization theory for the slow-light dynamics   in a Doppler-broadened electomagnetically induced transparency medium
  We model the effects of atomic thermal motion on the propagation of a light pulse in an electromagnetically induced transparency medium by introducing a set of effectively temperature-dependent parameters, including the Rabi frequency of the coupling field, optical density and relaxation rate of the ground state coherence, into the governing equations. The validity of this effective theory is verified by the close agreement between the theoretical results and the experimental data. 
Shih-Wei Su, Yi-Hsin Chen, Shih-Chuan Gou and Ite A. Yu
physics.optics physics.atom-ph