https://doi.org/10.1140/epjd/s10053-022-00438-y
Regular Article - Atomic Physics
Probing electronic decoherence with high-resolution attosecond photoelectron interferometry
1
Department of Physics, Lund University, Box 118, 22100, Lund, Sweden
2
Institute of Physics, Albert-Ludwig University, Stefan-Meier Strasse 19, 79104, Freiburg, Germany
3
Department of Chemical Physics, Lund University, Box 124, 22100, Lund, Sweden
4
Insituto de Química, Universidad Nacional Autónoma de México, 04510, Mexico City, Mexico
5
CEA, CNRS, LIDYL, Université Paris-Saclay, 91191, Gif-sur-Yvette, France
6
Department of Physics, University of Gotherburg, Origovägen 6B, 41296, Gothenburg, Sweden
7
Departamento de Química, Modulo 13, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049, Madrid, Spain
8
Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanoscience), Cantoblanco, 28049, Madrid, Spain
9
Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049, Madrid, Spain
10
Department of Physics, University of Central Florida, 32816, Orlando, FL, USA
11
CREOL, University of Central Florida, 32816, Orlando, FL, USA
Received:
28
April
2022
Accepted:
13
June
2022
Published online:
1
July
2022
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.
Guest editors: Carla Figueira de Morisson Faria, David B. Cassidy, Andrew Brown.
Supplementary Information The online version contains supplementary material available at https://doi.org/10.1140/epjd/s10053-022-00438-y.
© The Author(s) 2022
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