SAMOP 2023 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 63: Ultra-cold Plasmas and Rydberg Systems II (joint session A/Q)
Q 63.1: Hauptvortrag
Freitag, 10. März 2023, 11:00–11:30, F107
Coherent multidimensional spectroscopy of an ultracold gas — •Friedemann Landmesser1, Tobias Sixt1, Katrin Dulitz1,2, Lukas Bruder1, and Frank Stienkemeier1 — 1Institute of Physics, University of Freiburg, Germany — 2Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Austria
Femtosecond coherent multidimensional spectroscopy is demonstrated for an ultracold gas of Li atoms [1]. To this end, Li atoms are cooled in a magneto-optical trap and investigated using a phase-modulation time-domain spectroscopy technique, which is especially beneficial for dilute samples because of its high sensitivity [2]. The technique may offer the possibility to investigate time dependencies on the fs scale and coherent correlations in molecular systems with high frequency and time resolution [3]. Due to its quantum pathway selectivity, the technique is furthermore able to reveal multiphoton processes with specific numbers of interacting particles, as previously demonstrated in multiple quantum coherence experiments of weakly interacting thermal alkali atoms with mean interatomic distances in the micrometer-range [4-7].
[1] F. Landmesser et al., arXiv:2210.03023 (2022).
[2] P. Tekavec et al., J. Chem. Phys. 127, 214307 (2007)
[3] D. M. Jonas, Annu. Rev. Phys. Chem. 54, 425 (2003).
[4] L. Bruder et al., Phys. Rev. A 92, 053412 (2015).
[5] S. Yu et al., Opt. Lett. 44, 2795 (2019).
[6] L. Bruder et al., Phys. Chem. Chem. Phys. 21, 2276 (2019).
[7] B. Ames et al., New J. Phys. 24, 13024 (2022).