Erlangen 2022 – scientific programme
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MO: Fachverband Molekülphysik
MO 10: XUV-spectroscopy
MO 10.2: Talk
Wednesday, March 16, 2022, 10:45–11:00, MO-H6
Experimental control of quantum-mechanical entanglement in an attosecond pump-probe experiment — •Lisa-Marie Koll1, Laura Maikowski1, Lorenz Drescher1,2, Tobias Witting1, and Marc J.J. Vrakking1 — 1Max Born Institute, Berlin, Germany — 2Department of Chemistry, University of California, Berkeley, California 94720, USA
The photoionization of atoms or molecules creates a bipartite quantum system consisting of a photoelectron and an ion. In many experiments the observability of a physical quantity of interest relies on the coherence between the ionic or electronic parts of the wave function. However, this coherence can be limited by entanglement [1]. We show the control of entanglement by tuning the delay of two phase-locked XUV pulses in the dissociative ionization of hydrogen molecules [2]. Our experiments show the changing degree of vibrational coherence due to entanglement between the ionic and photoelectronic part of the quantum system.
[1] M. J.J. Vrakking, "Control of Attosecond Entanglement and Coherence", Physical Review Letters 126, 113203 (2021)
[2] L.-M. Koll et. al., "Experimental control of quantum-mechanical entanglement in an attosecond pump-probe experiment", Physical Review Letters (in press) (or: arXiv:2108.11772 (2021))