在超导电路中观察动态卡西米尔效应
C M Wilson1, G Johansson, A Pourkabirian
1Department of Microtechnology and Nanoscience, Chalmers University of Technology, Göteborg 412 96, Sweden. chris.wilson@chalmers.se
Nature
|November 19, 2011
概括
科学家直接观察到动态的卡西米尔效应,这是一个量子现象,在真空中虚拟粒子变成真正的光子. 这项开创性的实验使用了超导电路,为真空波动提供了直接的证据.
科学领域:
- 量子物理学的量子物理学
- 量子光学就是量子光学.
- 凝聚物质物理学 凝聚物质物理学
背景情况:
- 现代量子理论预测一个充满虚拟粒子的非空真空.
- 真空波动有间接可观测的后果,如Lamb转移.
- 直接观察真空波动,特别是虚拟粒子,一直是一个长期的目标.
研究的目的:
- 首次通过实验证明动态卡西米尔效应.
- 提供真空波动存在的直接证据.
- 探索观察到的现象的量子性质.
主要方法:
- 使用具有可调节电长的超导电路,特别是共平面传输线.
- 在高频率 (>10 GHz) 上实现了电路的电感率的快速调制,以模拟相对论运动.
- 采用超导量子干扰装置 (SQUID) 来进行电感度调制.
主要成果:
- 成功观察了动态的卡西米尔效应,由真空波动产生真实光子证明.
- 在发射的辐射中检测到两种模式的挤压.
- 结果提供了关于动态卡西米尔效应的第一个直接实验证据.
结论:
- 实验证实了动态卡西米尔效应的预测.
- 现在可以直接观察真空波动.
- 检测到的双模式挤压证实了光子生成过程的量子性质.
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