Amplification of electromagnetic waves by a rotating body

旋转体对电磁波的放大

• 批准号: EP/W007444/1
• 负责人: Hendrik Ulbricht
• 金额: $ 110.46万
• 依托单位: University of Southampton
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FW007444%2F1
• 关键词: Amplification; electromagnetic; waves; rotating; body

This is a blue-sky research proposal that aims to provide the first experimental evidence of a 50-year-old prediction in fundamental physics: the amplification of electromagnetic (EM) waves in the interaction with a rotating metallic or absorbing sphere. The importance of demonstrating this effect lies, in a first instance, in the underlying physical concept that mechanical rotation can induce the creation of negative frequencies. The presence of these negative frequencies is what causes the transition from absorption to gain and hence amplification of reflected waves. This prediction was first made by Zel'dovich in 1971 and is tightly connected to Roger Penrose's proposal in 1969 that it might be possible to extract energy from a rotating black hole. Zel'dovich's idea involving EM waves, has never been verified experimentally due to the apparently impossible technological barrier in realizing the amplification condition: the mechanical object rotation rates need to be faster than the oscillation frequency of the EM wave. The investigators have made a breakthrough discovery in the past 12 months that resolves the technological issue by resorting to evanescent field coupling to the absorbing object. This concept has been theoretically and experimentally verified with sound waves and theoretically extended to EM waves in a superconducting circuit. Looking forward, we aim to implement experiments that will show amplification of superconducting circuit modes that enclose and are evanescently coupled to a levitated metallic microsphere rotating at MHz frequencies. We will also study how achieving this will pave the way to observing the amplification and detection of quantum EM fluctuations, thus potentially providing new and exciting routes towards single photon interactions in superconducting circuits.

这是一项蓝色的研究建议，旨在提供50年历史的基本物理学预测的第一个实验证据：与旋转金属或吸收球体相互作用中电磁（EM）波的扩增。首先，在基本的物理概念上，机械旋转可以诱导负频率的产生。这些负频率的存在是导致从吸收到增益并因此扩增反射波的过渡。这一预测是由Zel'Dovich于1971年首次作出的，并与1969年罗杰·彭罗斯（Roger Penrose）的提议紧密相连，即有可能从旋转的黑洞中提取能量。 Zel'Dovich的涉及EM波的想法从未通过实验验证，因为在实现放大条件方面显然是不可能的技术障碍：机械对象旋转速率需要比EM波的振荡频率更快。在过去的12个月中，调查人员已经进行了突破性的发现，通过诉诸于吸收物体的逃生现场耦合来解决技术问题。在理论上和实验上，通过声波和理论上扩展到超导电路中的EM波。展望未来，我们旨在实施实验，以显示围绕并始终耦合到MHz频率旋转的浮动金属微球的超导电路模式的放大。我们还将研究实现这一目标将如何为观察量子EM波动的扩增和检测铺平道路，从而有可能为超导电路中的单个光子相互作用提供新的和令人兴奋的途径。

项目成果

Mechanical rotation modifies the manifestation of photon entanglement

• DOI: 10.1103/physrevresearch.5.l022005
• 发表时间: 2023-04
• 期刊: Physical Review Research
• 影响因子: 4.2
• 作者: M. Cromb;S. Restuccia;G. Gibson;M. Toroš;M. Padgett;D. Faccio

Ultrasensitive magnetometry with levitated ferromagnetic torque sensors

具有悬浮铁磁扭矩传感器的超灵敏磁力测量

• DOI: 10.26226/m.6275705966d5dcf63a311451
• 发表时间: 2022
• 作者: Ulbricht H

Collapse Models: A Theoretical, Experimental and Philosophical Review.

• DOI: 10.3390/e25040645
• 发表时间: 2023-04-12
• 期刊: Entropy (Basel, Switzerland)

Research campaign: Macroscopic quantum resonators (MAQRO)

研究活动：宏观量子谐振器（MAQRO）

• DOI: 10.1088/2058-9565/aca3cd
• 发表时间: 2023
• 期刊: Quantum Science and Technology
• 影响因子: 6.7
• 作者: Kaltenbaek, Rainer;Arndt, Markus;Aspelmeyer, Markus;Barker, Peter F.;Bassi, Angelo;Bateman, James;Belenchia, Alessio;Bergé, Joel;Braxmaier, Claus;Bose, Sougato
• 通讯作者: Bose, Sougato

Levitated Micromagnets in Superconducting Traps: A New Platform for Tabletop Fundamental Physics Experiments.

• DOI: 10.3390/e24111642
• 发表时间: 2022-11-11
• 期刊: Entropy (Basel, Switzerland)