Thema der Dissertation:
Control of Ion+ Photoelectron entanglement in attosecond pump-probe experiments
Control of Ion+ Photoelectron entanglement in attosecond pump-probe experiments
Abstract: In attosecond science commonly radiation in the extreme-ultraviolet (XUV) is used to study atomic or electronic dynamics. The high photon energy of this radiation typically ionizes any sample placed in their way, thus creating multicomponent quantum systems, e.g. an ion plus a photoelectron. These sub-systems can be entangled, which can have measurable consequences for any attosecond experiment, especially when the experiment only includes measurements in one of the sub-systems. In this thesis the importance of entanglement in attosecond photoionization is illustrated by using two phase-locked XUV pulses and a near-infrared (NIR) pulse to dissociatively ionize hydrogen molecules. The limiting role of entanglement between the ion and photoelectron is investigated towards the observability of vibrational coherence and subsequently electronic coherence in the ion. It is shown that the degree of ion+photoelectron entanglement and the degree of vibrational or electronic coherence, respectively, is controlled by the properties of the ionizing pulses. This study is a first approach to link ultrafast science with quantum information.
Time & Location
Jan 21, 2025 | 06:30 PM
Hörsaal A (1.3.14)
Fachbereich Physik, Arnimallee 14, 14195 Berlin