Higher-order spin and charge dynamics in a quantum dot-lead hybrid system

作者：Otsuka Tomohiro^*; Nakajima Takashi; Delbecq Matthieu R; Amaha Shinichi; Yoneda Jun; Takeda Kenta; Allison Giles; Stano Peter; Noiri Akito; Ito Takumi; Loss Daniel; Ludwig Arne; Wieck Andreas D; Tarucha Seigo^*

来源：Scientific Reports, 2017, 7(1): 12201.

DOI：10.1038/s41598-017-12217-6

Understanding the dynamics of open quantum systems is important and challenging in basic physics and applications for quantum devices and quantum computing. Semiconductor quantum dots offer a good platform to explore the physics of open quantum systems because we can tune parameters including the coupling to the environment or leads. Here, we apply the fast single-shot measurement techniques from spin qubit experiments to explore the spin and charge dynamics due to tunnel coupling to a lead in a quantum dot-lead hybrid system. We experimentally observe both spin and charge time evolution via first- and second-order tunneling processes, and reveal the dynamics of the spin-flip through the intermediate state. These results enable and stimulate the exploration of spin dynamics in dot-lead hybrid systems, and may offer useful resources for spin manipulation and simulation of open quantum systems.

• 出版日期2017-9-22
• 单位RIKEN