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一些道孔类型的连贯控制Gatemon Qubit
Han Zheng1, Luk Yi Cheung1, Nikunj Sangwan1
1Quantum- and Nanoelectronics Lab, Department of Physics, University of Basel, 4056 Basel, Switzerland.
Nano letters
|June 7, 2024
概括
我们使用/纳米线证明了新型盖特蒙量子位的连贯控制,为IV组材料实现了创纪录的连贯时间. 这一突破利用了独特的约瑟夫森结,为先进的量子计算铺平了道路.
科学领域:
- 量子信息科学 量子信息科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术纳米技术
背景情况:
- 盖特蒙量子比特,电调超导量子比特,被探索作为一个替代的transmon量子比特.
- / (Ge/Si) 芯/外纳米线为量子应用提供了技术上相关的材料.
- 实现高质量的约瑟夫森连接对于量子比特的性能和连贯性至关重要.
研究的目的:
- 为了证明一个gateemon量子位的完全连贯控制,利用一个Ge/Si核心/外纳米线中的孔载体.
- 为了实现和报告最长的连贯时间的IV组材料门门.
- 为了研究盖特蒙量子比特中的约瑟夫森交叉点的量子传输特性.
主要方法:
- 使用Ge/Si核心/外纳米线制造一个gateemon量子位.
- 实施了一种简单且可重复的回火技术,以创建高质量的约瑟夫森连接.
- 通过约瑟夫森交叉点对量子比特连贯时间和量子运输的表征.
主要成果:
- 证明了对盖特蒙量子位的完全连贯控制.
- 实现了迄今为止最长的IV组物质门的连贯时间.
- 确定通过狭窄的约瑟夫森交叉点的传输仅由具有高透明度 (高达统一) 的两个量子通道主导.
结论:
- 该Ge/Si纳米线gatemon量子位平台显示了量子信息应用的重大前景.
- 使用技术上相关的材料和观察到的极强自旋轨道合在少数频道的制度为量子比特设计提供了新的途径.
- 约瑟夫森连接制造的简单回火技术提高了这个量子比特平台的可重现性和可扩展性.
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