论文标题
$ν= 2 $的量子厅边缘通道中列维顿的碰撞干涉法
Collisional interferometry of Levitons in quantum Hall edge channels at $ν=2$
论文作者
论文摘要
我们考虑使用载量脉冲的Lorentzian电压脉冲的Hong-Ou-Mandel干涉仪，该脉冲量适用于量子霍尔边缘通道$ν= 2 $。由于相互作用的相互作用，在量子点接触处进行分区之前，注入的电子波盒要分数化。非常明显的是，与理论上通过使用其他注射技术在实验上观察到的东西有所不同，我们证明，当注射通过时间依赖性的电压脉冲（任意形状）发生时，Hong-ou-mandel噪声信号总是消失，以使对称设备的偏移和置换术之间的视觉量保持在对称性的距离之间，并降低了对置换术的视野。我们还表明，通过正确调整这些距离或通过在干涉仪的每个臂上的两个边缘通道上施加不同的电压，可以估计边缘间相互作用的强度。由于其实验性相关性，因此选择了洛伦兹类型的电压脉冲。
We consider a Hong-Ou-Mandel interferometer for Lorentzian voltage pulses applied to Quantum Hall edge channels at filling factor $ν=2$. Due to inter-edge interactions, the injected electronic wave-packets fractionalize before partitioning at a quantum point contact. Remarkably enough, differently from what theoretically predicted and experimentally observed by using other injection techniques, we demonstrate that, when the injection occurs through time-dependent voltage pulses (arbitrarily shaped), the Hong-Ou-Mandel noise signal always vanishes for a symmetric device, and that a mismatch in the distances between the injectors and the point of collision is needed in order to reduce the visibility of the dip. We also show that, by properly tuning these distances or by applying different voltages on the two edge channels in each arm of the interferometer, it is possible to estimate the intensity of the inter-edge interaction. The voltage pulses are chosen of the Lorentzian type because of their experimental relevance.
