Measurement-Based Private Quantum Computing on a Modular Superconducting Processor

Cloud platforms provide remote access to increasingly powerful quantum processors, raising concerns regarding data privacy. Blind quantum computation addresses these concerns by enabling a client to conceal their computation from the server executing it [1]. Here, we conceptually implement a measurement-based variant of blind quantum computation on a multi-chip superconducting processor. The system is partitioned into two modules, each flip-chip bonded onto a single carrier [2]. The server module creates a cluster state as an entangled quantum resource. As qubits are generated, they are forwarded to the client module. The client performs computations by adapting its measurement bases in real-time. We demonstrate that the client can implement universal single and two-qubit gates with local rotations and measurements only. As an example of blind quantum computation, we run a measurement-based three-qubit Deutsch-Josza algorithm. Finally, we verify the privacy principle of the computation. By analyzing the evolution of the server’s state, we demonstrate that it contains insignificant information about the client’s algorithm, consistent with the expected one-way flow of information.



[1] Broadbent et al., Universal Blind Quantum Computation, IEEE FOCS 2009 (2009)

[2] Dalton et al., arXiv:2507.15302 (2025)