近日，广西大学Chengxian Zhang团队研究了金刚石固体自旋的多噪声弹性非绝热几何量子控制。相关论文于2025年12月10日发表在《物理评论A》杂志上。

可靠且鲁棒的量子控制是实现在金刚石氮空位（NV）中心体系中进行量子信息处理的核心基础。然而，控制脉冲不可避免地会引入多种误差，导致量子退相干并阻碍可扩展性应用。

研究组通过实验报道了一种实验友好的多重噪声鲁棒非绝热几何量子门，该量子门在鲁棒性与相干性方面均显著优于传统动力学量子门。值得关注的是，即使失谐波动范围与最大拉比频率相当，MNR-NGQG的单量子门性能仍几乎保持不变。此外，在MNR-NGQG驱动下电子自旋的相干衰减时间显著延长至690 ± 30 µs，达到朴素动力学量子门对应值的3.5倍。通过量子过程层析技术表征，单量子门保真度可达0.9992(1)。得益于其实验可行性的设计及宽松的硬件要求，该研究为在NV中心系统中实现高保真量子控制提供了坚实范例，为量子信息科学中的实际应用铺平了道路。

附：英文原文

Title: Multiple-noise-resilient nonadiabatic geometric quantum control of solid-state spins in diamond

Author: Si-Qi Chen, Qi-Tao Duan, Chengxian Zhang, He Lu

Issue&Volume: 2025/12/10

Abstract: Reliable and robust control lies at the core of implementing quantum information processing with nitrogen-vacancy (NV) centers in diamond. However, control pulses inevitably introduce multiple errors, leading to decoherence and hindering scalable applications. Here, we experimentally report an experiment-friendly multiple-noise-resilient nonadiabatic geometric quantum gate (MNR-NGQG) that can significantly improve the conventional dynamical gate in both robustness and coherence. Notably, even when the detuning fluctuation range is comparable to the maximum Rabi frequency, the single-qubit gate performance of the MNR-NGQG remains almost unchanged. Additionally, the coherence decay time of the electron spin under MNR-NGQG driving is significantly extended to 690 ± 30 μs, 3.5 times longer than that of the naive dynamical counterpart. As a result, the fidelity of single-qubit gates reaches 0.9992(1), as characterized by quantum process tomography. With its experimentally feasible design and relaxed hardware requirements, our work offers a solid paradigm for achieving high-fidelity quantum control in the NV center system, paving the way for practical applications in quantum information science.

DOI: 10.1103/bq9h-qrd3

Source: https://journals.aps.org/pra/abstract/10.1103/bq9h-qrd3