Attosecond streaking of correlated two-electron transitions in helium.
We present fully ab initio simulations of attosecond streaking for ionization of helium accompanied by shakeup of the second electron. This process represents a prototypical case for strongly correlated electron dynamics on the attosecond time scale. We show that streaking spectroscopy can provide detailed information on the Eisenbud-Wigner-Smith time delay as well as on the infrared-field dressing of both bound and continuum states. We find a novel contribution to the streaking delay that stems from the interplay of electron-electron and infrared-field interactions in the exit channel. We quantify all the contributions with attosecond precision and provide a benchmark for future experiments.
Institute for Theoretical Physics, Vienna University of Technology, 1040 Vienna, Austria, EU. renate.pazourek@tuwien.ac.at
Renate
R
Pazourek
Johannes
J
Feist
Stefan
S
Nagele
Joachim
J
Burgdörfer