A quantum approximate optimization method for finding Hadamard matrices

Finding a Hadamard matrix of a specific order using a quantum computer can lead to a demonstration of practical quantum advantage. Earlier efforts using a quantum annealer were impeded by the limitations of the present quantum resource and its capability to implement high order interaction terms, wh...

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Vydáno v:Scientific reports Ročník 15; číslo 1; s. 33254 - 16
Hlavní autor: Suksmono, Andriyan Bayu
Médium: Journal Article
Jazyk:angličtina
Vydáno: London Nature Publishing Group UK 26.09.2025
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ISSN:2045-2322, 2045-2322
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Shrnutí:Finding a Hadamard matrix of a specific order using a quantum computer can lead to a demonstration of practical quantum advantage. Earlier efforts using a quantum annealer were impeded by the limitations of the present quantum resource and its capability to implement high order interaction terms, which for an M -order matrix will grow by . In this paper, we propose a novel qubit-efficient method by implementing the Hadamard matrix searching algorithm on a gate-based quantum computer. We achieve this by employing the Quantum Approximate Optimization Algorithm (QAOA). Since high order interaction terms that are implemented on a gate-based quantum computer do not need ancillary qubits, the proposed method reduces the required number of qubits into O ( M ). We present the formulation of the method, construction of corresponding quantum circuits, and experiment results in both a quantum simulator and a real gate-based quantum computer.
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ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-025-18778-1