Influence of bias-voltage noise on the inelastic cooper-pair tunneling amplifier (ICTA)

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-02-19 DOI:10.1063/5.0240842

U. Martel, R. Albert, F. Blanchet, J. Griesmar, G. Ouellet, H. Therrien, N. Nehra, N. Bourlet, A. Peugeot, M. Hofheinz

引用次数: 0

Abstract

We experimentally show that the inelastic cooper-pair tunneling amplifier (ICTA), implementing a DC-powered parametric amplification scheme, can achieve gain and noise performance similar to that of AC-powered Josephson parametric amplifiers. Using experimental data and simulations, we show that the ICTA has near-quantum-limited noise as long as low-frequency voltage noise, expressed as broadening of the Josephson frequency line, is narrower than the amplification bandwidth. We observe a gain of 20 dB across a 11 MHz bandwidth with noise below 1.7 times the quantum limit when the full width at half maximum of the Josephson frequency linewidth is 5.6 MHz.

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偏置电压噪声对非弹性铜对隧道放大器（ICTA）的影响

实验表明，采用直流供电参数放大方案的非弹性铜对隧道放大器（ICTA）可以获得与交流供电约瑟夫森参数放大器相似的增益和噪声性能。通过实验数据和仿真，我们发现只要低频电压噪声（表示为约瑟夫森频线的展宽）小于放大带宽，ICTA就具有近量子限制噪声。我们观察到，当约瑟夫森频率线宽的一半最大值为5.6 MHz时，在11 MHz带宽上的增益为20 dB，噪声低于量子极限的1.7倍。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.