Time correlation in two-electron transitions produced in fast collisions of atoms with matter and light
Abstract
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 Tunc, plus a correlated term Tcor=T-Tunc, which interconnects the time-dependent external interactions. We show that time correlation between electrons requires both Tcor and spatial electron-electron correlation. Two examples are analyzed. In transfer ionization the time correlation operator incoherently changes the shape of an electron-electron Thomas peak. In double excitation the influence of Tcor in amplitudes for coherently interfering pathways changes resonance intensities and profiles.
- Publication:
-
Physical Review A
- Pub Date:
- May 2001
- DOI:
- 10.1103/PhysRevA.63.052706
- Bibcode:
- 2001PhRvA..63e2706M
- Keywords:
-
- 34.80.Pa;
- 32.70.-n;
- 36.40.-c;
- Coherence and correlation in electron scattering;
- Intensities and shapes of atomic spectral lines;
- Atomic and molecular clusters