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Multi-client distributed blind quantum computation with the Qline architecture

Author

Listed:
  • Beatrice Polacchi

    (Sapienza Università di Roma)

  • Dominik Leichtle

    (CNRS, Sorbonne Université)

  • Leonardo Limongi

    (Sapienza Università di Roma)

  • Gonzalo Carvacho

    (Sapienza Università di Roma)

  • Giorgio Milani

    (Sapienza Università di Roma)

  • Nicolò Spagnolo

    (Sapienza Università di Roma)

  • Marc Kaplan

    (VeriQloud)

  • Fabio Sciarrino

    (Sapienza Università di Roma)

  • Elham Kashefi

    (CNRS, Sorbonne Université
    University of Edinburgh
    National Quantum Computing Centre)

Abstract

Universal blind quantum computing allows users with minimal quantum resources to delegate a quantum computation to a remote quantum server, while keeping intrinsically hidden input, algorithm, and outcome. State-of-art experimental demonstrations of such a protocol have only involved one client. However, an increasing number of multi-party algorithms, e.g. federated machine learning, require the collaboration of multiple clients to carry out a given joint computation. In this work, we propose and experimentally demonstrate a lightweight multi-client blind quantum computation protocol based on a recently proposed linear quantum network configuration (Qline). Our protocol originality resides in three main strengths: scalability, since we eliminate the need for each client to have its own trusted source or measurement device, low-loss, by optimizing the orchestration of classical communication between each client and server through fast classical electronic control, and compatibility with distributed architectures while remaining intact even against correlated attacks of server nodes and malicious clients.

Suggested Citation

  • Beatrice Polacchi & Dominik Leichtle & Leonardo Limongi & Gonzalo Carvacho & Giorgio Milani & Nicolò Spagnolo & Marc Kaplan & Fabio Sciarrino & Elham Kashefi, 2023. "Multi-client distributed blind quantum computation with the Qline architecture," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-43617-0
    DOI: 10.1038/s41467-023-43617-0
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    References listed on IDEAS

    as
    1. Frank Arute & Kunal Arya & Ryan Babbush & Dave Bacon & Joseph C. Bardin & Rami Barends & Rupak Biswas & Sergio Boixo & Fernando G. S. L. Brandao & David A. Buell & Brian Burkett & Yu Chen & Zijun Chen, 2019. "Quantum supremacy using a programmable superconducting processor," Nature, Nature, vol. 574(7779), pages 505-510, October.
    2. Kevin Marshall & Christian S. Jacobsen & Clemens Schäfermeier & Tobias Gehring & Christian Weedbrook & Ulrik L. Andersen, 2016. "Continuous-variable quantum computing on encrypted data," Nature Communications, Nature, vol. 7(1), pages 1-7, December.
    3. Tomoyuki Morimae & Keisuke Fujii, 2012. "Blind topological measurement-based quantum computation," Nature Communications, Nature, vol. 3(1), pages 1-6, January.
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