Mainz 2026 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 12: Quantum Computing and Simulation II
Q 12.4: Talk
Monday, March 2, 2026, 18:00–18:15, P 10
Mediated Gates and Quantum Cellular Automata in a Dual-Species Rydberg Array — •Alexander Impertro1,2, Ryan White1,2,3, Ka Hui Goh1,2, Vikram Ramesh3, Shraddha Anand3, and Hannes Bernien1,2,3 — 1Institute for Quantum Optics and Quantum Information, 6020 Innsbruck, Austria — 2University of Innsbruck, 6020 Innsbruck, Austria — 3University of Chicago and Pritzker School of Molecular Engineering, Chicago, IL 60637, USA
A key challenge in scaling up quantum processors and simulators is the need to implement individual qubit control in a resource-efficient yet performant manner. Rydberg arrays consisting of two distinct atomic species are a particularly promising platform to achieve this goal, with independent addressing and readout transitions enabling selective qubit control as well as mid-circuit operations. In this talk, we present how such a dual-species architecture allows the execution of a broad class of quantum circuits using only simple global control. Formulated in the framework of quantum cellular automata, we leverage discrete pulse sequences based on high-fidelity interspecies-mediated gates to prepare Bell, GHZ and cluster states, which we can additionally grow into graph-like states with longer-range connectivity. Moreover, the versatile Rydberg interaction landscape provided by two atomic species opens up the possibility to perform long-range multi-qubit gates. Together, these results showcase how dual-species processors enable a highly efficient use of control resources, enhance scalability and thus pave the way for the next generation of quantum information and simulation experiments.
Keywords: atom arrays; rydberg atoms; quantum information processing; quantum simulation; neutral atoms