A Calibration-Free 12.8-16.5GHz Cryogenic CMOS VCO with 202dBc/Hz FoM for Classic-Quantum Interface

📋 论文概要

本文提出了一款用于经典-量子接口的12.8-16.5GHz低温CMOS压控振荡器(VCO)，无需校准即可实现202dBc/Hz的优值(FoM)。该VCO旨在解决大规模量子比特阵列操控中的去相干误差问题，支持高保真度量子计算。

💡 主要创新点

• 首次在低温CMOS工艺中实现无需校准的VCO，频率覆盖12.8-16.5GHz，适用于量子比特操控。
• 通过优化电路设计，在4K低温下达到202dBc/Hz的FoM，显著降低相位噪声对量子比特相干性的影响。
• 采用标准CMOS工艺，无需额外校准或调谐，降低了经典-量子接口系统的复杂性和功耗。

🏷 关键词

📄 原文摘要

Chengdu Data Automation System Technologies, Chengdu, China 1 Recently, physical quantum-bits (Qubits) have achieved a remarkable operational fidelity >99.9% and a coherence time ranging from milliseconds to seconds with classic quantum controller (300K). Quantum error correction has also been successfully demonstrated. This paves the way towards a scalable, error-corrected quantum computer. However, the manipulation and sensing of large-scale Qubit array with high fidelity are still facing many challenges of error management. One error mechanism is the dephasing of the coherent superposition states of Qubits, induced by the phase noise (PN) of microwave driving pulses [1]. For the X/Y axis rotation in the Bloch sphere, a phase error of 0.57° corresponds to a Qubit fidelity of 99.99% (Fig. 34.5.1) [2]. The cryogenic CMOS phase-locked loops (PLLs) in the pulse generator and reflectometry

👥 作者与机构

Gengnanyang Zhang1, Haichuan Lin2, Cheng Wang1

University of Electronic Science and Technology of China, Chengdu, China