Attosecond streaking of correlated two-electron transitions in helium

Abstract

We present fully ab initio simulations of attosecond streaking for ionization of helium accompanied by shake-up of the second electron. This process represents a prototypical case for strongly correlated electron dynamics on the attosecond timescale. 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.

5 pages, 4 figures

References in corpus (3)

• Nonsequential two-photon double ionization of helium
• Delay in atomic photoionization
• Time delay between photoemission from the 2p and 2s subshells of Neon

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