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A: Fachverband Atomphysik
A 21: Poster – Atomic Systems in External Fields
A 21.1: Poster
Wednesday, March 4, 2026, 17:00–19:00, Philo 1. OG
Revealing emergent many-body phenomena by analyzing large-scale space-time records of monitored quantum systems — •Marcel Cech1, Cecilia De Fazio1, María Cea2,3, Mari Carmen Bañuls2,3, Igor Lesanovsky1,4, and Federico Carollo5 — 1Universität Tübingen, Tübingen, Germany — 2Max-Plank-Institut für Quantenoptik, Garching, Germany — 3Munich Center for Quantum Science and Technology (MCQST), München, Germany — 4University of Nottingham, Nottingham, United Kingdom — 5Coventry University, Coventry, United Kingdom
Recent advances in quantum simulators permit unitary evolution interspersed with locally resolved mid-circuit measurements. This paves the way for the observation of large-scale space-time structures in quantum trajectories and opens a window for the in situ analysis of complex dynamical processes. We demonstrate this idea using a paradigmatic dissipative spin model [1], which can be implemented, e.g., on Rydberg quantum simulators. Here, already the trajectories of individual experimental runs reveal surprisingly complex statistical phenomena. In particular, we exploit free-energy functionals for trajectory ensembles to identify dynamical features reminiscent of hydrophobic behavior observed near the liquid-vapor transition in the presence of solutes in water. We show that these phenomena are observable in experiments and discuss the impact of common imperfections, such as readout errors and disordered interactions.
[1] M. Cech, et al., arXiv:2507.00944 (2025)
Keywords: Monitored quantum systems; Rydberg quantum simulator; Quantum jump trajectories; Tensor network methods