Using a stimulated parametric down-conversion process combined with a conventional detector,we theoretically propose a scheme to realize the stimulated emission-based detector,and investigate the antinormally ordered correlation function and Fano factor for the coherent field based on it.Such a detection has advantages over the normally ordered one especially when the intensity of the field is weak.
This paper reports the experimental results on electromagnetically induced absorption (EIA) spectra observed in the system which does not satisfy completely the conditions given by Lezama et al [1999 Phys.Rev.A 59 4732].EIA signals on the transitions in the CsD2 line are able to be observed,where FgFe=Fg-1 as open systems.Theoretical model of Lezama et al is good for the case FgFe= Fg-1,considering spontaneous transfer of atomic coherences or populations this model is not able to explain our experimental results obtained in the case FgFe=Fg-1.This paper offers a theoretical model which is able to well explain the case FgFe=Fg-1.It also uses this theoretical model to explain the split and shift of EIA peaks,which have been obtained in experiments.
