Time correlation in two-electron transitions produced in fast collisions of atoms with matter and light - art. no. 052706

Time connection between electrons in dynamic atomic systems is considered. We describe time correlation in terms of the Dyson time ordering operator T . In this paper we decompose T into an uncorrelated term T-unc, plus a corr elated term T-cor = T - T-unc, which interconnects the time-dependent exter nal interactions. We show that time correlation between electrons requires both T-cor and spatial electron-electron correlation. Two examples are anal yzed, In transfer ionization the time correlation operator incoherently cha nges the shape of an electron-electron Thomas peak. In double excitation th e influence of T-cor in amplitudes fur coherently interfering pathways chan ges resonance intensities and profiles.