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arXiv 2007.08908quant-phcond-mat.mes-hall
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量子极限下多个亚铁磁球与微波腔的相干耦合

Coherent coupling between multiple ferrimagnetic spheres and a microwave cavity in the quantum-limit

Nicolò Crescini, Caterina Braggio, Giovanni Carugno, Antonello Ortolan, Giuseppe Ruoso

摘要:

电子的自旋共振可以耦合到微波腔模,以获得光子-磁振子混合系统。这些量子系统在基础物理和技术量子应用方面都得到了广泛的研究。在这篇文章中,大量的亚铁磁球耦合到一个单一的腔的行为进行了测试。我们使用谐振子的二次量子化模型从理论上描述我们的实验装置,并了解几个参数的影响。磁振子极化激元色散关系被用来表征系统,特别是由于多个球的真空拉比模式分裂的重点。我们结合简单的混合动力系统得到的结果来分析一个更复杂的行为,并表明,它可以被设计在这样一种方式,以尽量减少所需的自由度,以完全描述it. By研究单球耦合两个可能的尺寸效应相关的样品直径已被确定,而多球配置揭示了如何升级系统。这一特性对于在铁磁晕圈仪中实现轴子-电磁场换能器以用于暗物质搜索是有用的。我们的专用设置,包括在10个2毫米直径的YIG球耦合到一个铜微波腔,用于这一目的,并在mK温度下研究。此外,我们表明,新的应用程序的最优控制的混合动力系统可以预见的设置嵌入大量的样本。

英文摘要:

The spin resonance of electrons can be coupled to a microwave cavity mode to obtain a photon-magnon hybrid system. These quantum systems are widely studied for both fundamental physics and technological quantum applications. In this article, the behavior of a large number of ferrimagnetic spheres coupled to a single cavity is put under test. We use second-quantization modeling of harmonic oscillators to theoretically describe our experimental setup and understand the influence of several parameters. The magnon-polariton dispersion relation is used to characterize the system, with a particular focus on the vacuum Rabi mode splitting due to multiple spheres. We combine the results obtained with simple hybrid systems to analyze the behavior of a more complex one, and show that it can be devised in such a way to minimize the degrees of freedom needed to completely describe it. By studying single-sphere coupling two possible size-effects related to the sample diameter have been identified, while multiple-spheres configurations reveal how to upscale the system. This characterization is useful for the implementation of an axion-to-electromagnetic field transducer in a ferromagnetic haloscope for dark matter searches. Our dedicated setup, consisting in ten 2 mm-diameter YIG spheres coupled to a copper microwave cavity, is used for this aim and studied at mK temperatures. Moreover, we show that novel applications of optimally-controlled hybrid systems can be foreseen for setups embedding a large number of samples.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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