Fast arbitrary qutrit gates for NV centers in the low-field regime

EPJ Quantum Technology

卷:13

Research

Alberto López–García¹  Marcel Morillas–Rozas¹  Alberto Mayorgas²  Javier Cerrillo¹ 

[1] Escuela Politécnica Superior, Universidad CEU Fernando III, CEU Universities, Glorieta Cardenal Herrera Oria, 41930, Seville, Spain

[2] Research Group of Quantum Technologies, Área de Física Aplicada, Universidad Politécnica de Cartagena member of the European University of Technology EUT+, Campus Muralla del Mar, C/ Doctor Fleming, s/n, 30202, Cartagena, Spain

关键词: NV centers;    Qutrit gates;    SU(3);    Spin–1;    Quantum control;    Quantum state tomography;   

DOI  :  10.1140/epjqt/s40507-026-00554-3

 received in 2026-03-29, accepted in 2026-08-04,  发布年份 2026

来源: Springer

【 摘 要 】

The ground state of the negatively charged NV center forms a spin–1 manifold providing a versatile platform for sensing and information processing. Here we present a scheme for implementing fast arbitrary qutrit gates in the low–field regime using monochromatic microwave pulses of constant intensity tuned to the zero–field transition. By concatenating pulses with appropriate phases and durations, the NV-ERC scheme is extended from SU(2) operations in the double-quantum subspace to the full three–level structure. We show that arbitrary SU(3) operations can be decomposed into rotations in the double-quantum subspace together with effective implementations of the generators related to λˆ5\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$\hat{\lambda }_{5}$\end{document} and λˆ8\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$\hat{\lambda }_{8}$\end{document}. We further analyze the nontrivial λˆ5\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$\hat{\lambda }_{5}$\end{document} operation under pure dephasing, finding low average gate infidelities throughout the regime studied. We illustrate the SU(3) decomposition with a use case: performing quantum state tomography of the complete three-level density matrix.

【 授权许可】

CC BY   
© The Author(s) 2026

【 图 表 】

Fig. 1

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