Quantum Schemes for Distinguishing Quantum Gates

IF 2.8 Q3 QUANTUM SCIENCE & TECHNOLOGY

IET Quantum Communication Pub Date : 2025-08-29 DOI:10.1049/qtc2.70009

Songsong Dai

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Abstract

Discrimination of quantum gates is fundamental to quantum computation and information. This process involves determining whether an unknown unitary gate $A$ belongs to one of two sets of quantum gates, $X$ or $Y$ . In this paper, we first introduce a scheme for distinguishing between two specific single-qubit gates. Subsequently, we present a scheme for discriminating between two particular two-qubit gates. Both of these discrimination schemes are exact quantum algorithms.