Papers › On-Chip Verified Quantum Computation with an Ion-Trap Quantum Processing Unit

On-Chip Verified Quantum Computation with an Ion-Trap Quantum Processing Unit

31 Oct 2024arXiv:2410.24133links table onlyarchive 2025-07-28

Cica Gustiani, Dominik Leichtle, Daniel Mills, Jonathan Miller, Ross Grassie, Elham Kashefi

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We present and experimentally demonstrate a novel approach to verification and benchmarking of quantum computing, implementing it on an ion-trap quantum computer. Unlike previous information-theoretically secure verification protocols, which typically require quantum communication between client and server, our approach is implemented entirely on-chip. This eliminates the need for a quantum client and significantly enhances practicality. We perform tomography to justify the additionally required assumption that the noise is independent of the secret used to prepare the Server's single-qubit states. We quantify the soundness error which may be caused by residual secret dependencies. We demonstrate our protocol on the 20-qubit Quantinuum H1-1 ion-trap quantum processing unit, using qubit measurements and resets to construct measurement patterns with up to 52 vertices. To our knowledge, these are the largest verified measurement-based quantum computations performed to date. Our results pave the way for more accessible and efficient verification and benchmarking strategies in near-term quantum devices, enabling robust performance assessment without the added cost of external quantum infrastructure.

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