Cascaded Rydberg antiblockade: Multi-atom excitation dynamics and entanglement

• URL: http://arxiv.org/abs/2606.08536v1
• Date: Sun, 07 Jun 2026 09:32:10 GMT
• Title: Cascaded Rydberg antiblockade: Multi-atom excitation dynamics and entanglement
• Abstract summary: We propose a cascaded Rydberg antiblockade regime via a Floquet in four fully connected interacting atoms.<n>We generate entangled twin-Fock and Greenberger-Horne-Zeilinger states on the four atoms within sub-microsecond timescales.<n>Our work demonstrates a flexible and programmable synthetic dimension for quantum simulation and multipartite entanglement engineering.
• Score: 6.9978892835986715
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We propose a cascaded Rydberg antiblockade (RAB) regime via a Floquet modulation in four fully connected interacting atoms, which establishes a new synthetic dimension, Dicke-state lattice (DSL), in the space of collective spin excitations. By applying a global periodic driving, we synthesize an effective Hamiltonian that enables perfect state transfer across the five-site DSL with multiple programmable pathways from stepwise nearest-neighbor jumps to a single-step transition. This DSL platform further allows us to simulate a dynamic Su-Schrieffer-Heeger model, where soft quantum control is employed to achieve topologically inspired full RAB $|0000\rangle \to |1111\rangle$ with enhanced robustness against disorder. Moreover, by incorporating the shortcut to adiabaticity technique, we generate high-fidelity entangled twin-Fock and Greenberger-Horne-Zeilinger states on the four atoms within sub-microsecond timescales, outperforming the speed limits of conventional adiabatic protocols. Our work demonstrates a flexible and programmable synthetic dimension for quantum simulation and multipartite entanglement engineering in Rydberg atom arrays, paving the way for the future development of quantum information processing.

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