Preprint
Aug 2026
CNOT-Distance is NP-complete under all-to-all connectivity
A polynomial-time decoder yields NP-hardness of approximation within every fixed additive constant and, through an L-reduction from Minimum Vertex Cover on cubic graphs, APX-hardness of the associated CNOT-circuit optimisation problem.
Antonio Acuaviva, Arturo Acuaviva, Pablo Acuaviva
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