论文标题
随机共振在量子传输中的光谱特性
Spectral properties of stochastic resonance in quantum transport
论文作者
论文摘要
我们在理论上和实验性的随机共振中，在量子点耦合到电子源，并通过时间依赖性隧道屏障进行排水。一个中心发现是当前噪声频谱中可见的过渡，作为最初以零频率下降的分叉。过渡发生在随机共振工作点附近，与量化的泵送有关。为了评估来自测得的等待时间的功率谱，我们将续签理论的结果推广到AC驱动的情况。此外，我们开发了一种主方程方法，以获取用于驱动量子传输的相位平均电流噪声光谱。
We investigate theoretically and experimentally stochastic resonance in a quantum dot coupled to electron source and drain via time-dependent tunnel barriers. A central finding is a transition visible in the current noise spectrum as a bifurcation of a dip originally at zero frequency. The transition occurs close to the stochastic resonance working point and relates to quantized pumping. For the evaluation of power spectra from measured waiting times, we generalize a result from renewal theory to the ac driven case. Moreover, we develop a master equation method to obtain phase-averaged current noise spectra for driven quantum transport.
