非常大的羔羊转移在一个深强合电路QED系统与多模共振器共振器的多模共振器
Ziqiao Ao1,2,3, Sahel Ashhab4, Fumiki Yoshihara5,6
1Department of Applied Physics, Waseda University, Okubo 3-4-1, Shinjuku-ku, Tokyo, 169-8555, Japan. zqao@asagi.waseda.jp.
Scientific reports
|July 13, 2023
概括
我们在一个多模电路量子电力学系统中观察到极大的Lamb转移,该系统在深强合模式下运行. 这种现象是由与众多共振器模式的合驱动的,显著地重新规范化量子位能量,而不会完全抑制量子位能量.
科学领域:
- 量子电动力学 量子电动力学
- 超导电路中的超导电路
- 量子计算硬件 量子计算硬件
背景情况:
- 电路量子电动力学 (cQED) 系统对于量子信息处理至关重要.
- 深强合 (DSC) 模式,量子比特-共振器合可与它们的频率相比或超过,呈现出独特的现象.
- 了解多模式系统中的Lamb转移对于准确的量子比特表征和控制至关重要.
研究的目的:
- 在多模式cQED系统中实验和理论研究极大的Lamb转移.
- 分析对众多共振器模式的合对量子位能量重新规范化的影响.
- 在这样复杂的系统中开发用于计算Lamb转移的理论公式.
主要方法:
- 使用一个超导流量量子位 (FQ),在DSC模式下与共平面波导共振器 (CPWR) 进行感应合.
- 在CPWR的基本模式频率周围进行光谱.
- 通过单模量子拉比哈密尔顿式来适应光谱,并为多模Lamb转移推导理论公式.
主要成果:
- 观察到非常大的Lamb转移,基本模式贡献了82.3%,所有模式贡献了96.5%.
- 证明了CPWR中高频模式的合会导致高频切断效应,抑制特定频率以上的合.
- 表明这种切断可以防止量子比特能量被抑制到零,这是系统稳定性的关键发现.
结论:
- 在cQED系统中的多模式合,特别是在DSC系统中,导致了相当大的Lamb转移.
- 高频切断机制对于保持非零量子比特能量至关重要,尽管合强.
- 这些发现为设计和优化超导量子处理器提供了关键的见解.
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