用于缩放金刚石量子寄存器的高保真电子自旋门

IF 11.6 1区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Physical Review X Pub Date : 2025-05-27 DOI:10.1103/physrevx.15.021069

T. Joas, F. Ferlemann, R. Sailer, P. J. Vetter, J. Zhang, R. S. Said, T. Teraji, S. Onoda, T. Calarco, G. Genov, M. M. Müller, F. Jelezko

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引用次数: 0

摘要

Diamond是一个很有前途的量子信息处理平台，因为它可以承载高度相干的量子比特，从而可以构建大型量子寄存器。这种装置的先决条件是氮空位（NV）电子自旋之间的相干相互作用，从而实现可扩展的纠缠。偶极耦合NV自旋对之间的纠缠已被证实，但保真度有限，其误差来源尚未表征。在这里，我们设计并实现了金刚石中NV电子自旋之间的鲁棒双量子比特栅极，并量化了多个误差源对栅极性能的影响。实验证明，在环境条件下，记录门保真度为F2q=(96.0±2.5)%。我们对主要误差的识别为超越误差校正阈值的NV-NV门铺平了道路。2025年由美国物理学会出版

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High-Fidelity Electron Spin Gates for Scaling Diamond Quantum Registers

Diamond is a promising platform for quantum information processing as it can host highly coherent qubits that could allow for the construction of large quantum registers. A prerequisite for such devices is a coherent interaction between nitrogen-vacancy (NV) electron spins enabling scalable entanglement. Entanglement between dipolar-coupled NV spin pairs has been demonstrated but with a limited fidelity, and its error sources have not been characterized. Here, we design and implement a robust two-qubit gate between NV electron spins in diamond and quantify the influence of multiple error sources on the gate performance. Experimentally, we demonstrate a record gate fidelity of F2q=(96.0±2.5)% under ambient conditions. Our identification of the dominant errors paves the way towards NV-NV gates beyond the error correction threshold.

Published by the American Physical Society

2025

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来源期刊

Physical Review X PHYSICS, MULTIDISCIPLINARY-

CiteScore

24.60

自引率

1.60%

发文量

197

审稿时长

3 months

期刊介绍： Physical Review X (PRX) stands as an exclusively online, fully open-access journal, emphasizing innovation, quality, and enduring impact in the scientific content it disseminates. Devoted to showcasing a curated selection of papers from pure, applied, and interdisciplinary physics, PRX aims to feature work with the potential to shape current and future research while leaving a lasting and profound impact in their respective fields. Encompassing the entire spectrum of physics subject areas, PRX places a special focus on groundbreaking interdisciplinary research with broad-reaching influence.