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This research establishes a scalable framework for certifying quantum gates by reducing verification complexity from exponential to linear growth with qubit count. By leveraging Boolean derivatives, the method enables robust fidelity bounds using only simple binary measurements without requiring entangled particles or assumptions about internal device operations. This advancement is critical for validating complex multi-qubit systems like CCZ gates as quantum hardware scales toward practical application.

Surse care acoperăQuantum Zeitgeist, foreignpolicyjournal.com, sciencealert.com, Quantum Computing Report

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Researchers Bound Fidelity of Broad Quantum Gates

Quantum Zeitgeist30 septembrie 20264 min de cititArticolul și perspectiva sunt în engleză.

The number of configurations needed to verify quantum gates now grows linearly with qubit count, offering a path towards scalable device certification. Previously limited by inconsistent identification of input and output qubits, this work establishes bounds on gate fidelity using only two binary measurements per party. This scheme extends verification beyond single states to encompass arbitrary Boolean-phase gates via ‘Boolean derivatives’ and refined six-party analyses for complex operations like CCZ.

A new method certifies Boolean-phase gates using readily measurable signs derived from phase information via ‘Boolean derivatives’. This scheme enables strong testing with only two binary measurements per party and avoids both entangling measurements and assumptions about the device’s internal operation. The approach allows verification of an effective n-qubit channel, scaling linearly with its size. A technique converts complex phase information into simpler signs detectable through standard binary measurements, avoiding requirements for entangled…

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