• Accepted Paper

Random-party distillation on a superconducting processor

Alexander C. B. Greenwood, Jackson Russett, Hoi-Kwong Lo, and Li Qian

Phys. Rev. Applied - Accepted 5 October, 2026

DOI: https://doi.org/10.1103/rdd5-m72f

Abstract

Random party distillation refers to the process by which Einstein-Podolsky-Rosen pairs are probabilistically extracted from a single copy of a multipartite entangled state after multiple rounds of local operations and classical communications (LOCC). In this work, we propose a qubit-based implementation of a random party distillation protocol and demonstrate it on the superconducting hardware device, ibm_aachen. We implement up to 4-rounds of the protocol, achieving a distillation rate of ∼0.85 pairs/ W state, surpassing previous experimental demonstrations. Our results demonstrate the utility of multi-round LOCC protocols in an experimental regime that remains comparatively unexplored.

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