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SYML: Symposium Molecular Spectroscopy of Liquid Jets

SYML 1: Molecular Spectroscopy in Liquid Jets

SYML 1.4: Hauptvortrag

Montag, 10. März 2025, 12:30–13:00, HS 1+2

Decoherence and electron transport in liquid water observed with attosecond interferometric spectroscopy — •Hugo Marroux et al — Université Paris-Saclay, CEA, LIDYL, 91191 Gif-sur-Yvette, France

The dynamics of electron scattering in liquid samples are of fundamental importance. However, time resolved observations are difficult due to stringent experimental challenges as the process begins on the attosecond timescale [1] with an effective mean free path limited to about 8 Å [2]. To investigate electron dynamics in water we perform RABBIT [3] experiments in both gas and liquid water over a photon energy range from 37 to 74 eV. The RABBIT technique is based on an interferometric scheme where the oscillation contrast can be used as an observable of decoherence phenomena [3], while its phase provides insight into electron’s dynamics and transports. I will discuss recent results obtained using an experimental setup where a liquid micro-jet device is combined with a two foci geometry enabling referencing of the RABBIT trace against an atomic species.

We will discuss the role of inelastic scattering to interpret the large time delay (300 as) observed. Additionally, the analysis of the contrast over the energy range reveals the effect of decoherence in water. I will present our ongoing efforts to characterize the decoherence dynamics in terms of the dephasing of a representative density matrix.

References :[1] Jordan et al., Science 369 (2020), [2] Mondal et al., Nat. Phys. 19 (2023), [3] Paul et al., Science 292 (2001), [4] Bourassin Bouchet et al., Phys. Rev. X 10 (2020)

Keywords: attosecond; liquid phase; photoemission