Freiburg 2024 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 24: Poster II
Q 24.47: Poster
Tuesday, March 12, 2024, 17:00–19:00, KG I Foyer
Rydberg spectroscopy in the strong driving regime and self-organized criticality — •Patrick Mischke1,2, Florian Binoth1, Jana Bender1, Thomas Niederprüm1, and Herwig Ott1 — 1Department of Physics and Research center OPTIMAS, Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau — 2Max Planck Graduate Center with the Johannes Gutenberg-Universitätt Mainz (MPGC)
Autler-Townes splitting in coupled two-level-systems is a well-known effect in atomic physics. However, for strong driving in real atomic systems, additional states like other hyperfine structure states or magnetic sublevels are admixed. As a result, complex spectra, deviating from the symmetrical two-level Autler-Townes splitting, emerge.
We experimentally investigate these spectra in a thermal cloud of 87Rb atoms by resonantly coupling the 6P3/2, F=3 state to a Rydberg state with varying Rabi frequency.
Our experiments confirm, that multilevel effects have to be considered in the Autler-Townes regime. As a general rule, the splitting between peaks is not equal to the Rabi frequency if the coupling strength exceeds the energetic distance of adjacent states.
In a manybody system, Rydberg atoms interact strongly over very large distances, leading to effects such as blockade and facilitation. In the absence of disorder, an off-resonantly driven system is expected to exhibit a phase transition between an active and an absorbing phase. We present experimental data and our work towards understanding the role of disorder.
Keywords: Autler-Townes; Rydberg; Self-Organized Criticality; Facilitation; Rubidium