Quantum control of ro-vibrational dynamics and application to light-induced molecular chirality

• URL: http://arxiv.org/abs/2310.11570v1
• Date: Tue, 17 Oct 2023 20:33:25 GMT
• Title: Quantum control of ro-vibrational dynamics and application to light-induced molecular chirality
• Authors: Monika Leibscher, Eugenio Pozzoli, Alexander Blech, Mario Sigalotti, Ugo Boscain, Christiane P. Koch
• Abstract summary: Achiral molecules can be made temporarily chiral by excitation with electric fields. We go beyond the assumption of molecular orientations to remain fixed during the excitation process.
• Score: 39.58317527488534
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Achiral molecules can be made temporarily chiral by excitation with electric fields, in the sense that an average over molecular orientations displays a net chiral signal [Tikhonov et al., Sci. Adv. 8, eade0311 (2022)]. Here, we go beyond the assumption of molecular orientations to remain fixed during the excitation process. Treating both rotations and vibrations quantum mechanically, we identify conditions for the creation of chiral vibrational wavepackets -- with net chiral signals -- in ensembles of achiral molecules which are initially randomly oriented. Based on the analysis of symmetry and controllability, we derive excitation schemes for the creation of chiral wavepackets using a combination of (a) microwave and IR pulses and (b) a static field and a sequence of IR pulses. These protocols leverage quantum rotational dynamics for pump-probe spectroscopy of chiral vibrational dynamics, extending the latter to regions of the electromagnetic spectrum other than the UV.

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