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

Ilaria Gianani*, Alessio Belenchia, Stefano Gherardini, Vincenzo Berardi, Marco Barbieri, Mauro Paternostro

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

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.

Original languageEnglish
Article number045018
Number of pages14
JournalQuantum Science and Technology
Volume8
Issue number4
Early online date22 Aug 2023
DOIs
Publication statusPublished - 01 Oct 2023

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science (miscellaneous)
  • Physics and Astronomy (miscellaneous)
  • Electrical and Electronic Engineering

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