Inclusion of non-idealities in the continuous photodetection model
  Some non-ideal effects as non-unit quantum efficiency, dark counts, dead time and cavity losses that occur in experiments are incorporated within the continuous photodetection model by using the analytical quantum trajectories approach. We show that in standard photocounting experiments the validity of the model can be verified, and the formal expression for the quantum jump superoperator can also be checked. 
A. V. Dodonov, S. S. Mizrahi, and V. V. Dodonov