减轻超导电路中的连贯损失,使用分子自组装单层.
Mohammed Alghadeer1,2,3, Archan Banerjee4,5, Kyunghoon Lee4,5
1Department of Physics, University of California, Berkeley, CA, 94720, USA. ghadeer@berkeley.edu.
Scientific reports
|November 9, 2024
概括
分子自组装单层 (SAM) 化学地与超导电路中的接口结合,防止氧化物再生,并提高量子设备的性能. 这种新的方法提高了量子计算和传感应用中的质量因素.
科学领域:
- 量子计算和传感是量子计算和传感.
- 材料科学用于超导电路.
背景情况:
- 超导电路中的脱凝,由接口上的两级系统 (TLS) 缺陷引起,限制了量子计算和传感.
- 由于持续的氧化物再生长,如氧化物蚀刻等现有方法不足,阻碍了设备的性能.
研究的目的:
- 引入和评估一种使用分子自组装单层 (SAM) 来减轻超导电路接口上的TLS缺陷的新方法.
- 证明SAM能够防止氧化物再生和定制介电特性,从而提高共振器性能.
主要方法:
- 分子自组装单层 (SAM) 应用于超导共平面波导 (CPW) 共振器的接口.
- 在氧化蚀刻后使用SAM进行表面被动化.
- 在毫克尔文温度下进行微波测量.
- 使用X射线光电子光谱 (XPS) 和传输电子显微镜 (TEM) 进行材料表征.
主要成果:
- SAMs有效地阻碍了刻在超导表面上的氧化物再生.
- 在共振器接口实现了量身定制的介电性质.
- 在多个SAM处理的共振器中,测量质量因子的持续改善与传统蚀刻的相比.
结论:
- 自组装单层为超导量子设备中的接口被动化提供了一个有希望和兼容的技术.
- 这种方法显著提高了共振器质量因素,解决了量子技术开发中的一个关键挑战.
- 集成SAMS是一个可行的途径,可以提高超导量子计算机和传感器的性能和可扩展性.
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