Probing electronic decoherence with high-resolution attosecond photoelectron interferometry
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Published:2022-07
Issue:7
Volume:76
Page:
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ISSN:1434-6060
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Container-title:The European Physical Journal D
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language:en
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Short-container-title:Eur. Phys. J. D
Author:
Busto DavidORCID, Laurell Hugo, Finkelstein-Shapiro Daniel, Alexandridi Christiana, Isinger Marcus, Nandi Saikat, Squibb Richard J., Turconi Margherita, Zhong Shiyang, Arnold Cord L., Feifel Raimund, Gisselbrecht Mathieu, Salières Pascal, Pullerits Tönu, Martín Fernando, Argenti Luca, L’Huillier Anne
Abstract
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$$^2$$
2
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.
Graphic Abstract
Funder
Vetenskapsrådet H2020 European Research Council Knut och Alice Wallenbergs Stiftelse Kungliga Fysiografiska Sällskapet i Lund MICINN Fundación Carmen y Severo Ochoa Division of Physics Laserlab-Europe Agence Nationale de la Recherche Agence National de la Recherche PAPIIT
Publisher
Springer Science and Business Media LLC
Subject
Atomic and Molecular Physics, and Optics
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