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一个薄膜冷子,适合用作超低温开关

Peter J Lowell¹, John A B Mates², W Bertrand Doriese¹

¹National Institute of Standards and Technology, Boulder, Colorado 80305, USA.

Applied physics letters

|March 18, 2024

概括

这项研究介绍了一种用于低于凯尔文温度的新型冷子开关,提供高电流容量 (约900微A) 和低功耗. 这种超导开关可以实现更快,更高效的低温电子应用.

科学领域:

低温物理低温物理
超导电子设备中的超导体.
量子计算硬件量子计算硬件

背景情况:

超导电路对于科学应用至关重要,但缺乏高电流,低功率的开关,以低于凯尔文的操作.
现有的开关技术无法满足对极低温度的苛刻要求.

研究的目的:

开发和演示一个针对低于凯尔文的温度优化的低温开关.
为了满足超导电路中高电流容量和低功耗的需求.

主要方法:

一种新型的冷子装置的制造和特征.
磁场应用以抑制超导和控制切换状态.
测量关键电流,控制电流,泄漏电流和开关速度.

主要成果:

在低于凯尔文的温度下,证明了一个可操作的冷子开关.
在封闭状态下达到最大设备电流约900微A.
切换到开放状态需要2 mA的控制电流,泄漏率为500 nA.
观察到的切换速度大于200 ns.

结论:

开发的冷子是一种可行的高电流开关,用于低凯尔文级应用.
潜在的应用包括敏感的低温仪表中的单极,双抛开关.
这一进步有助于为科学研究开发更复杂的超导电路.

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