Mainz 2026 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 42: Poster – Ultracold Matter (joint session Q/A)

Q 42.28: Poster

Mittwoch, 4. März 2026, 17:00–19:00, Philo 2. OG

Long-Range Enhanced Robust Quantum State Transfer in Topological Rydberg Models — •Siri Raupach, Mathias B. M. Svendsen, and Beatriz Olmos — Institut für Theoretische Physik, Universität Tübingen, Auf der Morgenstelle 14, 72076 Tübingen, Germany

Fast and robust quantum state transfer (QST) between distant nodes in a quantum network is essential in quantum information processing. We present a framework for robust topological QST in a quantum optical realization of the extended SSH and Rice-Mele model with bipartite long-range hoppings. In quasi one dimensional chains of long-range dipole-dipole coupled Rydberg atoms on two spatially offset sublattices, the topological phase depends on this spatial offset and manifests as topologically protected edge states in the non-trivial regime. Thus, robust edge-to-edge QST of a Rydberg excitation can be achieved by varying the sublattice offset adiabatically. In chains consisting of both odd and even numbers of atoms, the transfer efficiency depends on the specifics of the transfer path. Notably, we find that the transfer efficiency is significantly improved when considering realistic long-range hoppings compared to the standard case of nearest neighbor hoppings. The resulting transfer can be implemented well within the lifetime of the Rydberg atoms, and due to its topological nature is robust against positional disorder of the atoms within experimentally realistic tolerances.

Keywords: Quantum State Transfer; Topology; Rydberg Atoms; Long-Range Interaction