Probing electronic decoherence with high-resolution attosecond photoelectron interferometry
Abstract
Quantum coherence plays a fundamental role in the study and control of ultrafast dynamics in matter. In the case of photoionization, entanglement of the photoelectron with the ion is a well known source of decoherence when only one of the particles is measured. Here we investigate decoherence due to entanglement of the radial and angular degrees of freedom of the photoelectron. We study two-photon ionization via the 2s2p autoionizing state in He using high spectral resolution photoelectron interferometry. Combining experiment and theory, we show that the strong dipole coupling of the 2s2p and 2p states results in the entanglement of the angular and radial degrees of freedom. This translates, in angle integrated measurements, into a dynamic loss of coherence during autoionization.
Cite
@article{arxiv.2111.12037,
title = {Probing electronic decoherence with high-resolution attosecond photoelectron interferometry},
author = {David Busto and Hugo Laurell and Daniel Finkelstein Shapiro and Christina Alexandridi and Marcus Isinger and Saikat Nandi and Richard Squibb and Margherita Turconi and Shiyang Zhong and Cord Arnold and Raimund Feifel and Mathieu Gisselbrecht and Pascal Salières and Tönu Pullerits and Fernando Martín and Luca Argenti and Anne L'Huillier},
journal= {arXiv preprint arXiv:2111.12037},
year = {2022}
}