A Multi-Qubit Cryo-CMOS SoC with Polar-Based Electron-Spin and PDM-Based Nuclear-Spin Controllers for Color Centers in Diamond

📋 论文概要

本文提出了一款用于金刚石中氮空位(NV)色心多量子比特控制的低温CMOS SoC，集成了基于Class-DE RFDAC的电子自旋控制器和基于class-D PDM的核自旋控制器。通过开关共享线圈实现多频段、大电流驱动，达到了高Rabi频率和高保真度的量子逻辑门，解决了可扩展量子计算中多比特控制的挑战。

💡 主要创新点

• 首次将Class-DE RFDAC和class-D PDM驱动器结合，用于电子和核自旋的多量子比特控制。
• 通过开关实现单线圈共享驱动，支持2.5-3.2GHz电子自旋和1.9-2.1MHz核自旋的多频段操作。
• 在低温CMOS平台上实现了大电流(70mA/38mA)、高Rabi频率(2.31MHz/1.93kHz)和高保真度(99.34%/99.78%)的量子逻辑门，且去耦相干时间超过50ms。

🏷 关键词

📄 原文摘要

nitrogen-vacancy (NV) centers in diamond enables a scalable quantum platform. This work introduces a combined Class-DE RFDAC and classD PDM driver for multi-qubit electron- and nuclear-spin control. A switch allows shared coil driving enabling multi-band 2.5-3.2GHz(1.9-2.1MHz), large-current 70mA(38mA), highRabi frequency 2.31MHz(1.93kHz) and high-fidelity 99.34(3)%(99.78(2)%) electron(nuclear) quantum logic gates with decoupled coherence times >50ms. Quantum bits (qubits) based on nitrogen-vacancy (NV) centers in diamond combine highfidelity electron-spin gates with long-coherence nuclear-spin memories, making them strong candidates for exploring quantum computation and networking. Electron spins enable fast GHz control and photon-mediated entanglement for distributed quantum architectures [1,2],

👥 作者与机构

Niels Fakkel*, Luc Enthoven*, Mohamed Abdelrahman Elbadry, Hendrik Benjamin van Ommen, Margriet van Riggelen, Jiwon Yun, Tim Hugo Taminiau,

Fabio Sebastiano**, Masoud Babaie** TU Delft, Delft, The Netherlands *Equally Credited Authors (ECAs) Abstract Co-integrating a cryo-CMOS SoC with