Diagnostics of quantum-gate coherences deteriorated by unitary errors via end-point-measurement statistics

作者：Ilaria Gianani, Alessio Belenchia, Stefano Gherardini, V. Berardi, Marco Barbieri, Mauro Paternostro · 发表于：Quantum Science and Technology · 年份：2023 · DOI：10.1088/2058-9565/acedca · 被引用次数：10 · 研究领域：Quantum Information and Cryptography、Advanced Thermodynamics and Statistical Mechanics、Quantum Mechanics and Applications

Abstract Quantum coherence is a central ingredient in quantum physics with several theoretical and technological ramifications. We consider a figure of merit encoding the information on how the coherence generated on average by a quantum gate is affected by unitary errors (coherent noise sources) in the form of rotation-angle and rotation-axis errors. We provide numerical evidences that such information is well captured by the statistics of local energy measurements on the output states of the gate. These findings are then corroborated by experimental data taken in a quantum optics setting.