设计用于微波单光子计数器量子测量的深冷超低耗散放大器和测量单元

Pub Date : 2024-01-11 DOI:10.1063/10.0023896
O. G. Turutanov, A. M. Korolev, V. I. Shnyrkov, A. P. Shapovalov, M. Baránek, S. Kern, V. Yu. Lyakhno, P. Neilinger, M. Grajcar
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引用次数: 0

摘要

本文讨论了为在 10 mK 下进行量子测量而设计测量单元和低背动深冷放大器的要求和细节。该设备是基于超导通量量子比特的微波单光子计数器的一部分。放大器中的高电子迁移率晶体管(HEMT)在非饱和微电流状态下工作,每个晶体管的直流耗散功率仅为 1 μW。在 450 MHz 频率下,模拟放大器增益为 15 dB,采用高阻抗(≈ 5 kΩ)信号源和标准 50Ω 输出。
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Design of deeply cooled ultra-low dissipation amplifier and measuring cell for quantum measurements with a microwave single-photon counter
The requirements and details of designing a measuring cell and low-back-action deeply-cooled amplifier for quantum measurements at 10 mK are discussed. This equipment is a part of a microwave single-photon counter based on a superconducting flux qubit. The high-electron mobility transistors (HEMTs) in the amplifier operate in unsaturated microcurrent regime and dissipate only 1 μW of dc power per transistor. Simulated amplifier gain is 15 dB at 450 MHz with a high-impedance (≈ 5 kΩ) signal source and standard 50-Ω output.
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