Strong feedback and current noise in nanoelectromechanical systems
Strong feedback and current noise in nanoelectromechanical systems
复制标题
纳米机电系统中的强反馈和电流噪声
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
Y. Nazarov
中科院分区：
文献类型：
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作者：
O. Usmani;Y. Blanter;Y. Nazarov
我们证明了单电子隧道器件弱耦合到欠阻尼单模振荡器的强反馈机制的可行性。在这种情况下，会产生机械振荡，并且电流会发生强烈变化，而电流噪声相对于泊松值而言参数较大。这种状态需要隧道振幅的能量依赖性。对于足够快的隧道速率，电流噪声的机械贡献可能超过泊松值，甚至超出强反馈范围。
We demonstrate the feasibility of a strong feedback regime for a single-electron tunneling device weakly coupled to an underdamped single-mode oscillator. In this regime, mechanical oscillations are generated and the current is strongly modified, whereas the current noise is parametrically large with respect to the Poisson value. This regime requires energy dependence of the tunnel amplitudes. For sufficiently fast tunnel rates, the mechanical contribution to current noise can exceed the Poisson value even beyond the strong feedback regime.