Phase noise in a Duffing oscillator induced by quantum turbulence
Phase noise in a Duffing oscillator induced by quantum turbulence
复制标题
量子湍流引起的杜芬振荡器中的相位噪声
DOI:
10.1103/physrevb.106.094502
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发表时间:
2022
影响因子:
3.7
通讯作者:
Chan, H. B.
中科院分区:
文献类型:
--
作者:
Barquist, C. S.;Jiang, W. G.;Gunther, K.;Lee, Y.;Chan, H. B.
We report a comprehensive investigation of the effects of quantum turbulence and quantized vorticity in superfluidat ultralow temperatures on a nonlinear microelectromechanical systems (MEMS) resonator which is uniquely sensitive to fluctuations of quantum turbulence. We observe that the phase noise of the MEMS is significantly increased in the presence of turbulence, while the noise in the amplitude channel is negligible in comparison. We formulated a model based on a fluctuating number of vortices pinned on the device to explain the observed noise. We also present measurements of the noise statistics and power spectra, providing insight into the dissipation mechanism of vortices at the micrometer scale in the ultraquantum regime. The high degree of customizability of MEMS oscillators coupled with their sensitivity to a small number of vortices lays the foundation for a more complete understanding of the interaction between quantized vortices and oscillating structures, and also offers a window into the dynamics of single vortices and small-scale fluctuations of quantum turbulence.
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DOI:
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发表时间:
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期刊:
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