Slow light in semiconductor quantum dots: effects of non-Markovianity   and correlation of dephasing reservoirs
  A theoretical investigation on slow light propagation based on eletromagnetically induced transparency in a three-level quantum-dot system is performed including non-Markovian effects and correlated dephasing reservoirs. It is demonstraonated that the non-Markovian nature of the process is quite essential even for conventional dephasing typical of quantum dots leading to significant enhancement or inhibition of the group velocity slow-down factor as well as to the shifting and distortion of the transmission window. Furthermore, the correlation between dephasing reservoirs may also either enhance or inhibit non-Markovian effects. 
D. Mogilevtsev, E. Reyes-Gomez, S. B. Cavalcanti, and L. E. Oliveira
quant-ph