盖特蒙·库比特 (Gatemon Qubit) 在一个量子井异构结构上
Elyjah Kiyooka1, Chotivut Tangchingchai1, Leo Noirot1
1Université Grenoble Alpes,CEA, Grenoble INP, IRIG, PHELIQS, 38000 Grenoble, France.
Nano letters
|December 17, 2024
概括
研究人员使用 (Ge) 量子井开发了一种新的gatemon量子比特,证明了门调节的超导特性. 这一突破验证了先进量子计算组件的新平台.
科学领域:
- 量子计算是一种量子计算.
- 凝聚物质物理学 凝聚物质物理学
- 超导电路中的超导电路
背景情况:
- 盖特蒙是超导量子比特,它利用一个能够调节盖特的半导体弱环.
- 现有的超导量子比特通常依赖于约瑟夫森交叉点,但门调节性提供了增强的控制.
- 基于的异构结构正在成为量子设备的有希望的平台.
研究的目的:
- 设计和描述一个使用Ge/SiGe异构的gatemon量子位设备.
- 为了研究量子比特应用的Ge量子井中的超导近距离效应.
- 为了证明量子比特属性的门电压调整性,并评估连贯时间.
主要方法:
- 在Ge/SiGe异构上制造一个带有微波电路的gatemon设备.
- 利用Ge量子井中的二维洞气体作为一个可调节门的弱环.
- 执行拉比振荡和拉姆齐干扰测量以探测量子比特动态.
主要成果:
- 在3.5GHz范围内演示了一个门调节的量子比特频率.
- 达到的放松时间 (T1) 高达119 ns,拉姆西连贯时间 (T2*) 高达70 ns.
- 重现了类似的Ge/SiGe异构平台的结果,证实了设备的可行性.
结论:
- 在Ge/SiGe异构平台上,成功地托管了一个功能性的gateemon qubit.
- 这项工作验证了一种创新的方法,用于创建门调节的超导弱环.
- 该平台显示了开发盖特蒙和平价保护的cos2φ) 量子的潜力.
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