一个与高阻抗多模共振器合的约瑟夫森结的新兴量子相位过渡
Luca Giacomelli1, Cristiano Ciuti2
1Université Paris Cité, CNRS, Matériaux et Phénomènes Quantiques, Paris, France.
Nature communications
|June 27, 2024
概括
我们揭示了多模共振器环境如何驱动约瑟夫森交叉点中的关键性. 充电能量在热力学极限中占主导地位,导致激发状态水平反交叉信号的相位过渡.
科学领域:
- 量子物理学的量子物理学
- 凝聚物质物理学 凝聚物质物理学
背景情况:
- 约瑟夫森连接与电阻环境相结合,带来了基本的物理挑战.
- 带有高阻抗多模共振器的超导平台重新引起了人们对该领域的兴趣.
研究的目的:
- 调查与日益增多的共振器模式相结合的约瑟夫森交叉点中的新兴关键性.
- 了解多模环境在重新规范接口能量的作用.
主要方法:
- 精确的对角化被用来分析系统.
- 该研究的重点是热力学极限,因为模式的数量增加.
主要成果:
- 当阻抗超过电阻量时,充电能量在热力学极限中占主导地位.
- 一个相位过渡是由第一个激发状态的水平反交所驱动的,而不是基本状态.
- 在过渡点观察到光谱的普遍性.
结论:
- 响应器环境中的模式数量决定了约瑟夫森结的关键行为.
- 引人注目的光谱特征证实了相位过渡,与最近的实验发现保持一致.
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