Get started
Work

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

Year: 2023
Type: article
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.
DOI: 10.1088/2058-9565/acedca
Authors: Ilaria Gianani, Alessio Belenchia, Stefano Gherardini, Vincenzo Berardi, Marco Barbieri, Mauro Paternostro
Institutions: Roma Tre University, Queen's University Belfast, University of Tübingen, AREA Science Park, National Institute of Optics, University of Florence, Polytechnic University of Bari
Language: English
Open Access status: green
Funders: Department for the Economy, Leverhulme Trust, Royal Society, European Commission, Deutsche Forschungsgemeinschaft, HORIZON EUROPE Framework Programme, Engineering and Physical Sciences Research Council, H2020 Future and Emerging Technologies
Awards: G1365187887, G154481267, G186052194, G2460800214, Testing the Large-Scale Limit of Quantum Mechanics, G2967200528, G3533222608, EPSRC-SFI: Non-Equilibrium Steady-States of Quantum many-body systems: uncovering universality and thermodynamics (QuamNESS), G3843968587, EPSRC-SFI: Non-Equilibrium Steady-States of Quantum many-body systems: uncovering universality and thermodynamics (QuamNESS), G434337789, G5677546062, Testing the Large-Scale Limit of Quantum Mechanics, G8534662092, Spectral-Temporal Metrology with Tailored Quantum Measurements, G8780137145
OpenAlex ID: W4386048102
FWCI: 1.033
Cites: 60
Cited by: 11
Related to: 10