Study of quantum coherence in multiple system utilizing multi single-lead quantum dots

我们已经演示了利用半导体纳米结构的多个量子系统的实验。利用量子点接触测量了多量子系统的重要组成部分量子霍尔边缘态的弛豫，并讨论了弛豫机制。我们还开发了一种新的方法，利用单导联量子点来检测半导体纳米结构中的局部自旋极化，这是自旋相关量子系统中必不可少的。利用这种新方法，我们探测了在量子霍尔边缘态中形成的局部自旋极化。

We have demonstrated experiments relating multiple quantum systems utilizing semiconductor nano structures. We measured relaxation in quantum Hall edge states, which are important components of multiple quantum systems, with quantum point contacts and discussed about the relaxation mechanisms. We also developed a new method to detect local spin polarization in semiconductor nano structures, which is essential in spin related quantum systems, by using single-lead quantum dots and confirmed its operation. With this new method, we probed local spin polarization formed in quantum Hall edge states.