Probing time-ordering in two-photon double ionization of helium on the attosecond time scale

Pazourek, R. and Nagele, S. and Burgdörfer, Joachim (2015) Probing time-ordering in two-photon double ionization of helium on the attosecond time scale. JOURNAL OF PHYSICS B: ATOMIC MOLECULAR AND OPTICAL PHYSICS, 48 (6). ISSN 0953-4075

Preview

Text 1405.1779.pdf Available under License Creative Commons Attribution. Download (1MB) | Preview

Abstract

We show that time ordering underlying time-dependent quantum dynamics is a physical observable accessible by attosecond streaking. We demonstrate the extraction of time ordering for the prototypical case of time-resolved two-photon double ionization (TPDI) of helium by an attosecond XUV pulse. The Eisenbud-Wigner-Smith time delay for the emission of a two-electron wavepacket and the time interval between subsequent emission events can be unambiguously determined by attosecond streaking. The delay between the two emission events sensitively depends on the energy, pulse duration, and angular distribution of the emitted electron pair. Our fully-dimensional ab-initio quantum mechanical simulations provide benchmark data for experimentally accessible observables.

Actions (login required)

Edit Item