Mainz 2026 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 52: Ultra-cold Plasmas and Rydberg Systems II (joint session A/Q)

Q 52.2: Invited Talk

Thursday, March 5, 2026, 11:30–12:00, N 2

Dynamical decoupling in a dipolar Rydberg gas — •Meny Menashes, Eduard Braun, Matthias Lotze, Maharshi Pran Bora, Gerhard Zürn, and Matthias Weidemüller — Physikalisches Institut, Heidelberg, Germany

We present our ongoing effort to measure out-of-time-order correlators (OTOCs) in a disordered, dipolar Rydberg gas. Building on our recent time-reversal experiments in a dipolar quantum many-body spin system and advances in microwave Hamiltonian engineering, we aim to realize a novel dynamical decoupling protocol based solely on microwave control. This approach enables precise time reversal and suppression of higher-order interactions, providing a clean platform to study information scrambling and quantum dynamics. Via state-selective ionization field tomography reconstruction of the global magnetization is measured, granting access to both global and local observables. The experiment represents a step toward controlled investigations of thermalization, localization, and dynamical quantum phase transitions in isolated long-range interacting spin systems

Keywords: Dynamical Decoupling; out-of-time-order-correlators; Floquet Hamiltonian engineering; Rydberg gas