O. Kocharovskaya et al., GENERALIZATION OF THE MAXWELL-BLOCH EQUATIONS TO THE CASE OF STRONG ATOM-FIELD COUPLING, Physical review. A, 49(6), 1994, pp. 4928-4934
We derive the generalized set of Maxwell-Bloch equations which takes i
nto account the dependence of relaxation coefficients on the amplitude
and frequency of the coherent field. This has interesting implication
s in many problems in quantum optics and laser physics, e.g., the prob
lem of lasing without inversion due to a strong coherent generating fi
eld.