@article {PhysRevA.63.063810,
title = {Generalized Einstein B coefficients for coherently driven three-level systems},
journal = {Phys. Rev. A},
volume = {63},
year = {2001},
month = {May},
pages = {063810},
publisher = {American Physical Society},
abstract = {Generalized Einstein B coefficients for coherently driven closed three-level systems are introduced by means of the quantum-jump technique. The nonreciprocity between stimulated emission and absorption for both one-photon and two-photon gain and loss processes has been studied and quantified in terms of the rates of the particular incoherent processes present in each three-level system. Some general properties of these generalized Einstein B coefficients have been found. In particular, whenever the generalized Einstein B coefficient for one-photon gain overcomes that for one-photon loss then the generalized Einstein B coefficient for two-photon loss overcomes that for two-photon gain, and vice versa. Finally, we have obtained simple analytical expressions indicating the way to maximize the asymmetry between stimulated emission and absorption coefficients either for one-photon or for two-photon processes.},
doi = {10.1103/PhysRevA.63.063810},
url = {http://link.aps.org/doi/10.1103/PhysRevA.63.063810},
author = {J. Mompart and R. Corbal{\'a}n}
}