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A: Fachverband Atomphysik

A 37: Poster – Ultra-cold Plasmas and Rydberg Systems (joint session A/Q)

A 37.9: Poster

Donnerstag, 5. März 2026, 17:00–19:00, Philo 1. OG

Towards a global otoc in a rydberg spin system — •Maharshi Pran Bora, Eduard Braun, Meny Menashes, Matthias Lotze, Varad Dhopadkar, Gerhard Zuern, and Matthias Weidemueller — University of Heidelberg

Out-of-time-order correlators (OTOCs) quantify the scrambling of operator information in a quantum system. Most studies formulate this scrambling as a spreading of correlation between local observables in the system. However, the access to these local observables can be challenging sometimes. Interestingly, these correlators can also be studied using global observables of the system. The formulation of multiple quantum coherences and its connection to OTOCs, gives a way to probe the scrambling of global observables in the system [1]. In our Rydberg spin system, we are moving towards measuring this type of global OTOC with a global magnetization measurement. These global OTOC measurements could provide an insight into the localization or thermalization aspects of our rydberg spin system.

[1] Gärttner, M., Hauke, P., & Rey, A. M. (2017). Relating out-of-time-order correlations to entanglement via multiple-quantum coherences. Phys. Rev. Lett. 120, 040402.

Keywords: out-of-time-order correaltors; time reversal; rydberg spin system; multiple quantum coherences