论文标题
通道混合对量子霍尔边缘两粒子干涉测量法的可见性的影响
Impact of Channel Mixing on the Visibility of Two-particle Interferometry in Quantum Hall Edge States
论文作者
论文摘要
我们考虑了一个两粒子干涉仪，其中电压源应用于欧姆触点将电子激发注入一对共磁边缘通道中。我们分析了由于间边缘间隧穿而导致的通道混合对干涉仪输出下测得的电流噪声的影响。由于这种混合，通常预期的是同步注射源的噪声抑制是不完整的，从而降低了干扰的可见性。我们研究混合对噪声可见性的影响取决于电压驱动器的不同形状。此外，我们比较了一个简单的模型，该模型涉及源和量子点接触之间的单个混合点与弱混合点连续分布的更现实情况。
We consider a two-particle interferometer, where voltage sources applied to ohmic contacts inject electronic excitations into a pair of copropagating edge channels. We analyze the impact of channel mixing due to inter-edge tunneling on the current noise measured at the output of the interferometer. Due to this mixing, the noise suppression typically expected for synchronized injecting sources is incomplete, thereby reducing the visibility of the interference. We investigate to which extent the impact of mixing on the noise visibility depends on different shapes of the voltage drives. Furthermore, we compare a simple model involving a single mixing point between the sources and the quantum point contact to the more realistic case of a continuous distribution of weak mixing points.
