Gate-set evaluation metrics for closed-loop optimal control on nitrogen-vacancy center ensembles in diamond.

Autor: Vetter PJ; Institute for Quantum Optics, Ulm University, Ulm, Germany.; Center for Integrated Quantum Science and Technology (IQST), Ulm, Germany., Reisser T; Peter Grünberg Institute - Quantum Control (PGI-8), Forschungszentrum Jülich GmbH, Jülich, Germany.; Institute for Theoretical Physics, University of Cologne, Cologne, Germany., Hirsch MG; Institute for Quantum Optics, Ulm University, Ulm, Germany.; Center for Integrated Quantum Science and Technology (IQST), Ulm, Germany.; Present Address: NVision Imaging Technologies GmbH, Ulm, Germany., Calarco T; Peter Grünberg Institute - Quantum Control (PGI-8), Forschungszentrum Jülich GmbH, Jülich, Germany.; Institute for Theoretical Physics, University of Cologne, Cologne, Germany.; Dipartimento di Fisica e Astronomia, Università di Bologna, Bologna, Italy., Motzoi F; Peter Grünberg Institute - Quantum Control (PGI-8), Forschungszentrum Jülich GmbH, Jülich, Germany.; Institute for Theoretical Physics, University of Cologne, Cologne, Germany., Jelezko F; Institute for Quantum Optics, Ulm University, Ulm, Germany.; Center for Integrated Quantum Science and Technology (IQST), Ulm, Germany., Müller MM; Peter Grünberg Institute - Quantum Control (PGI-8), Forschungszentrum Jülich GmbH, Jülich, Germany.
Jazyk: angličtina
Zdroj: NPJ quantum information [npj Quantum Inf] 2024; Vol. 10 (1), pp. 96. Date of Electronic Publication: 2024 Oct 02.
DOI: 10.1038/s41534-024-00893-y
Abstrakt: A recurring challenge in quantum science and technology is the precise control of their underlying dynamics that lead to the desired quantum operations, often described by a set of quantum gates. These gates can be subject to application-specific errors, leading to a dependence of their controls on the chosen circuit, the quality measure and the gate-set itself. A natural solution would be to apply quantum optimal control in an application-oriented fashion. In turn, this requires the definition of a meaningful measure of the contextual gate-set performance. Therefore, we explore and compare the applicability of quantum process tomography, linear inversion gate-set tomography, randomized linear gate-set tomography, and randomized benchmarking as measures for closed-loop quantum optimal control experiments, using a macroscopic ensemble of nitrogen-vacancy centers in diamond as a test-bed. Our work demonstrates the relative trade-offs between those measures and how to significantly enhance the gate-set performance, leading to an improvement across all investigated methods.
Competing Interests: Competing interestsThe authors declare no competing interests.
(© The Author(s) 2024.)
Databáze: MEDLINE
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