A macroscopic mechanical resonator driven by mesoscopic electrical back-action
A macroscopic mechanical resonator driven by mesoscopic electrical back-action
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DOI：
10.1038/nature09123
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发表时间：
2010-07
期刊：
影响因子：
64.8
通讯作者：
J. Stettenheim;M. Thalakulam;F. Pan;M. Bal;Zhonqing Ji;W. Xue;L. Pfeiffer;K. West;M. Blencowe;A. Rimberg
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文献类型：
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作者：
J. Stettenheim;M. Thalakulam;F. Pan;M. Bal;Zhonqing Ji;W. Xue;L. Pfeiffer;K. West;M. Blencowe;A. Rimberg
具有机械和光学或电学耦合自由度的系统具有迷人的动力学，通过量子行为的宏观表现，为经典世界和量子世界之间的转变提供了新的见解。特别令人感兴趣的是电子和光子对机械振荡器的反向作用，这可能导致机械运动的冷却和放大。此外，反馈自然与反作用有关，已被预测对耦合到机械振荡器的探测器的噪声具有重大影响。最近还证明了这种反馈效应导致了碳纳米管纳米机械谐振器中单电子输运和机械运动之间的强耦合。在这里，我们提出的噪声测量表明，通过射频量子点接触隧道传输的电子的介观反向作用导致宿主晶体的驱动振动。这种效应是微观量子行为的一种显著的宏观表现，在微观量子行为中，机械振子-宿主晶体-的运动由隧道电子的统计涨落决定，主体晶体由1020个原子组成。
Systems with coupled mechanical and optical or electrical degrees of freedom,have fascinating dynamics that, through macroscopic manifestations of quantum behaviour, provide new insights into the transition between the classical and quantum worlds. Of particular interest is the back-action of electrons and photons on mechanical oscillators, which can lead to cooling and amplification of mechanical motion,,. Furthermore, feedback, which is naturally associated with back-action, has been predicted to have significant consequences for the noise of a detector coupled to a mechanical oscillator,. Recently it has also been demonstrated that such feedback effects lead to strong coupling between single-electron transport and mechanical motion in carbon nanotube nanomechanical resonators,. Here we present noise measurements which show that the mesoscopic back-action of electrons tunnelling through a radio-frequency quantum point contact causes driven vibrations of the host crystal. This effect is a remarkable macroscopic manifestation of microscopic quantum behaviour, where the motion of a mechanical oscillator—the host crystal, which consists of on the order of 1020atoms—is determined by statistical fluctuations of tunnelling electrons.