Efficient Entanglement Purification Circuit Design for Dual-Species Atom Arrays

Abstract:Entanglement purification protocols (EPPs) are essential for generating high-fidelity entangled states in noisy quantum systems, enabling robust quantum networking and computation. Building on the circuit of the foundational recurrence protocol, we generalize two-way EPPs to arbitrary stabilizer codes. Through analytical derivations and noisy circuit simulations incorporating circuit-level noise, we demonstrate enhanced purification performance, with fidelity improvements and finite distillation rates for distillable input states. We propose efficient circuit designs for EPPs tailored to dual-species Rydberg atom arrays, leveraging species-specific laser control and interspecies Rydberg interactions. Introducing a low-overhead operation set, the dual-species atom convenient operation set, we facilitate straightforward compilation of EPP circuits without the need for ancillary atoms or complex atom rearrangements. Our framework provides practical guidance for near-term implementations on dual-species platforms, advancing towards scalable entanglement distribution in neutral atom systems and paving the way for fault-tolerant quantum technologies.

20 pages, 10 figures. Revised with corrections and clarifications following journal publication

arXiv:2509.12370 [quant-ph]

(or arXiv:2509.12370v3 [quant-ph] for this version)

https://doi.org/10.48550/arXiv.2509.12370 Focus to learn more arXiv-issued DOI via DataCite

https://doi.org/10.1103/6j15-7mty Focus to learn more DOI(s) linking to related resources

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