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Scalable Multi-Qpu Design Achieves Logarithmic Communication for Dicke State Preparation

Researchers introduced a scalable multi‑QPU circuit that prepares Dicke states with logarithmic communication complexity. The construction prepares a 16‑qubit, 4‑excitation Dicke state while keeping circuit size O(nk) and depth O(p²k + logk log(n/k)). For two QPUs the method meets a proven lower bound on communication, demonstrating optimality. By balancing inter‑QPU bandwidth and local gate overhead, the design moves large‑scale quantum computing closer to reality.