Designing Fault-Tolerant Blind Quantum Computation

• URL: http://arxiv.org/abs/2505.21621v1
• Date: Tue, 27 May 2025 18:00:03 GMT
• Title: Designing Fault-Tolerant Blind Quantum Computation
• Authors: Gefen Baranes, Iria W. Wang, Francisco Machado, Aziza Suleymanzade, Pieter-Jan Stas, Yan-Cheng Wei, Susanne F. Yelin, Johannes Borregaard, Mikhail D. Lukin,
• Abstract summary: Blind quantum computing allows a client with limited quantum capabilities to delegate quantum computations to a more powerful server.<n>Existing BQC protocols face challenges when scaling to large-scale computations due to photon losses, low efficiencies, and high overheads.<n>We develop an architecture for scalable fault-tolerant blind quantum computation.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Blind quantum computing (BQC) is a computational paradigm that allows a client with limited quantum capabilities to delegate quantum computations to a more powerful server while keeping both the algorithm and data hidden. However, in practice, existing BQC protocols face significant challenges when scaling to large-scale computations due to photon losses, low efficiencies, and high overheads associated with fault-tolerant operations, requiring the client to compile both logical operations and error correction primitives. We use a recently demonstrated hybrid light-matter approach [PRL 132, 150604 (2024); Science 388, 509-513 (2025)] to develop an architecture for scalable fault-tolerant blind quantum computation. By combining high-fidelity local gates on the server's matter qubits with delegated blind rotations using photons, we construct loss-tolerant delegated gates that enable efficient algorithm compilation strategies and a scalable approach for fault-tolerant blind logical algorithms. Our approach improves the error-correction threshold and increases the speed and depth of blind logical circuits. Finally, we outline how this architecture can be implemented on state-of-the-art quantum hardware, including neutral atom arrays and solid-state spin defects. These new capabilities open up new opportunities for deep circuit blind quantum computing.

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