Quantum Cellular Automata on a Dual-Species Rydberg Processor

• URL: http://arxiv.org/abs/2601.16257v1
• Date: Thu, 22 Jan 2026 19:00:01 GMT
• Title: Quantum Cellular Automata on a Dual-Species Rydberg Processor
• Abstract summary: Quantum cellular automata (QCAs) is a promising framework that bypasses the control problem.<n>We realize QCAs on a dual-species Rydberg array of rubidium and cesium atoms, leveraging independent global control of each species.<n>We explore many-body dynamics and generate a variety of entangled states, including GHZ states, 96.7(1.7)%-fidelity Bell states, 17-qubit cluster states, and high-connectivity graph states.
• Score: 30.617053556305915
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: As quantum devices scale to larger and larger sizes, a significant challenge emerges in scaling their coherent controls accordingly. Quantum cellular automata (QCAs) constitute a promising framework that bypasses this control problem: universal dynamics can be achieved using only a static qubit array and global control operations. We realize QCAs on a dual-species Rydberg array of rubidium and cesium atoms, leveraging independent global control of each species to perform a myriad of quantum protocols. With simple pulse sequences, we explore many-body dynamics and generate a variety of entangled states, including GHZ states, 96.7(1.7)%-fidelity Bell states, 17-qubit cluster states, and high-connectivity graph states. The versatility and scalability of QCAs offers compelling routes for scaling quantum information systems with global controls, as well as new perspectives on quantum many-body dynamics.

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