Probing Electronic Fluxes via Time-Resolved X-ray Scattering

Abstract

The current flux density is a vector field that can be used to describe theoretically how electrons flow in a system out-of-equilibrium. In this work, we unequivocally demonstrate that the signal obtained from time-resolved X-ray scattering does not only map the time-evolution of the electronic charge distribution, but also encodes information about the associated electronic current flux density. We show how the electronic current flux density qualitatively maps the distribution of electronic momenta and reveals the underlying mechanism of ultrafast charge migration processes, while also providing quantitative information about the timescales of electronic coherences.

arXiv comment6 pages, 4 figures

References in corpus (14)

• X-ray diffraction from isolated and strongly aligned gas-phase molecules with a free-electron laser
• Imaging electronic quantum motion with light
• Self-referenced coherent diffraction x-ray movie of Angstrom- and femtosecond-scale atomic motion
• ORBKIT - A Modular Python Toolbox for Cross-Platform Post-Processing of Quantum Chemical Wavefunction Data
• Monitoring Nonadiabatic Avoided Crossing Dynamics in Molecules by Ultrafast X-Ray Diffraction
• An Open-Source Framework for Analyzing $N$-Electron Dynamics: I. Multi-Determinantal Wave Functions
• Proposed imaging of the ultrafast electronic motion in samples using x-ray phase-contrast
• X-ray imaging of chemically active valence electrons during a pericyclic reaction
• Theory of time-resolved non-resonant x-ray scattering for imaging ultrafast coherent electron motion
• Time-, Frequency-, and Wavevector-Resolved X-Ray Diffraction from Single Molecules
• Role of electron-electron interference in ultrafast time-resolved imaging of electronic wavepackets
• Characterizing dissociative motion in time-resolved x-ray scattering from gas-phase diatomic molecules
• Adiabatic electronic flux density: a Born-Oppenheimer Broken Symmetry ansatz
• Time-resolved ultrafast x-ray scattering from an incoherent electronic mixture

Cited by in corpus (10)

• Attosecond Electron Microscopy
• Probing molecular chirality via laser-induced electronic fluxes
• Imaging charge-migration in chiral molecules using time-resolved x-ray diffraction
• Real-Space Inversion and Super-Resolution of Ultrafast Scattering
• Ultrafast Molecular Frame Quantum Tomography
• Atomic real-space perspective of light-field-driven currents in graphene
• A Laboratory Frame Density Matrix for Ultrafast Quantum Molecular Dynamics
• Probing the Effect of Molecular Structure Saddling on Ultrafast Charge Migration via Time-Resolved X-ray Diffraction
• Charge Migration in Heterocyclic Five-Membered Rings
• Simulations for x-ray imaging of wave-packet dynamics