<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Ultrafast Laser Control of Molecular Quantum Dynamics from a Core-Electron Perspective"^^ . "This work introduces two experimental approaches to control quantum dynamics in molecules, employing core electrons as messengers. A laser source providing ultrashort pulses has been developed to access the timescale of electronic and structural dynamics inside molecules. Pulses of few-cycle durations in the 1 μm to 2 μm short-wavelength infrared (SWIR) spectral region provide intensities up to 10^15 W/cm^2. In combination with a vacuum beamline, this experimental setup\r\nallows for ultrafast laser control of molecular dynamics probed by core-electron\r\ntransitions via x-ray absorption spectroscopy (XAS). The first experiment investigates the manipulation of molecular electronic structure. Here, a soft x-ray (SXR) pulse probes simultaneously to an SWIR pulse of variable intensity. The measured intensity dependent absorbance changes in SF6 reveal an increased effective electronic-exchange energy. This demonstrates the alteration of this purely quantum-mechanical component of the electron-electron interaction for the first time. In a second experiment, an SWIR pulse induces coherent molecular vibrations with amplitudes of ten times the diameter of the nucleus. Subsequently, a time-delayed SXR pulse probes the bond-length changes via core-level transitions. This enables an unprecedented 14 femtometer precision which paves the way for site-specific vibrational metrology in gas-phase molecules. Overall, these results enable ultrafast chemical control on a quantum level."^^ . "2022" . . . . . . . "Patrick Dominik"^^ . "Rupprecht"^^ . "Patrick Dominik Rupprecht"^^ . . . . . . "Ultrafast Laser Control of Molecular Quantum Dynamics from a Core-Electron Perspective (PDF)"^^ . . . "Dissertation_PatrickRupprecht.pdf"^^ . . . "Ultrafast Laser Control of Molecular Quantum Dynamics from a Core-Electron Perspective (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "Ultrafast Laser Control of Molecular Quantum Dynamics from a Core-Electron Perspective (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Ultrafast Laser Control of Molecular Quantum Dynamics from a Core-Electron Perspective (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Ultrafast Laser Control of Molecular Quantum Dynamics from a Core-Electron Perspective (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Ultrafast Laser Control of Molecular Quantum Dynamics from a Core-Electron Perspective (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #31798 \n\nUltrafast Laser Control of Molecular Quantum Dynamics from a Core-Electron Perspective\n\n" . "text/html" . . . "500 Naturwissenschaften und Mathematik"@de . "500 Natural sciences and mathematics"@en . . . "530 Physik"@de . "530 Physics"@en . .