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

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 co...

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Veröffentlicht in:Scientific reports 2017-09, Vol.7 (1), p.12201-7, Article 12201
Hauptverfasser: 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
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Sprache:eng
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Zusammenfassung: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.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-017-12217-6