Helium Surface Fluctuations Investigated with Superconducting Coplanar Waveguide Resonator
Helium Surface Fluctuations Investigated with Superconducting Coplanar Waveguide Resonator
复制标题
使用超导共面波导谐振器研究氦表面波动
DOI：
10.1007/s10909-022-02689-w
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发表时间：
2022
影响因子：
2
通讯作者：
Pollanen, J.
中科院分区：
文献类型：
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作者：
Beysengulov, N. R.;Mikolas, C. A.;Kitzman, J. M.;Lane, J. R.;Edmunds, D.;Rees, D. G.;Henriksen, E. A.;Lyon, S. A.;Pollanen, J.
最近的实验上的平面内运动状态的电子漂浮在液氦的表面上的微波谐振器的耦合，揭示了氦表面波动的重要性，这种运动的相干性。在这里，我们调查这些表面波动，通过研究超导共面波导（CPW）谐振器的谐振特性充满超流氦，谐振器的电磁模式体积的一个显着的分数耦合到液体的表面动力学。我们提出了初步的结果，实时CPW谐振器的频率偏移驱动的氦波动，这是量化的，通过其功率谱密度和使用商业加速度计的测量结果进行比较。我们发现，一个相当大的贡献CPW谐振器的噪声来源于氦表面的机械振动所产生的脉冲管（PT）制冷机上的低温恒温器上的实验进行。
Recent experiments on the coupling of the in-plane motional state of electrons floating on the surface of liquid helium to a microwave resonator have revealed the importance of helium surface fluctuations to the coherence of this motion. Here we investigate these surface fluctuations by studying the resonance properties of a superconducting coplanar waveguide (CPW) resonator filled with superfluid helium, where a significant fraction of the resonator’s electromagnetic mode volume is coupled to the surface dynamics of the liquid. We present preliminary results on real-time CPW resonator frequency shifts driven by helium fluctuations, which are quantified via their power spectral density and compared with measurements using a commercial accelerometer. We find that a considerable contribution to the CPW resonator noise originates from the mechanical vibrations of the helium surface generated by the pulse tube (PT) cryocooler on the cryostat on which the experiments were performed.
使用超导谐振器在超流氦上捕获单个电子
DOI：
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发表时间：
2019
期刊：
影响因子：
--
作者：
G. Koolstra
通讯作者：
G. Koolstra