Quantum information scrambling in strongly disordered Rydberg spin systems

Abstract:

Despite the fact that power-law interactions occur in a plethora of physical systems, their many-body dynamics is far less understood than that of nearest-neighbor interacting systems. Here, we study information scrambling in strongly disordered spin systems with power-law interactions via out-of-time-order correlators (OTOCs). Numerically, we find pronounced differences in the dynamical spreading of OTOCs between nearest-neighbor and power-law interacting systems. This deviation persists even for short-range interactions, opposing the common view that these interactions produce dynamics equivalent to the nearest-neighbor case. In a detailed experimental proposal, tailored but not limited to Rydberg tweezer setups, we present a protocol to extract OTOCs in XXZ Heisenberg spin systems with tunable anisotropy and programmable disorder based on currently available techniques.

M. Müllenbach, S. Geier, A. Braemer, E. Braun, T. Franz, G. Zürn, M. Weidemüller, M.
Gärttner, „Quantum information scrambling in strongly disordered Rydberg spin systems“,
22. Dez. 2025, arXiv:2512.19856 (2025).

https://arxiv.org/abs/2512.19856

Related to Project A05