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On universality of hardware-efficient ansatzes
Hokuto Iwakiri, Keita Kanno·November 5, 2025
Quantum Physics
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Abstract
The hardware-efficient ansatz (HEA) is one of the most important class of parametrized quantum circuits for near-term applications of quantum computing. We show that the problem of simulating some major classes of the HEA is BQP-complete by explicitly demonstrating that any relevant quantum circuit can be efficiently represented as an HEA circuit of those classes.