Coherent transfer of electron spin correlations assisted by dephasing noise

Autor: Takashi Nakajima, Matthieu R. Delbecq, Tomohiro Otsuka, Shinichi Amaha, Jun Yoneda, Akito Noiri, Kenta Takeda, Giles Allison, Arne Ludwig, Andreas D. Wieck, Xuedong Hu, Franco Nori, Seigo Tarucha

Publikováno v: Nature Communications, Vol 9, Iss 1, Pp 1-8 (2018)

Methods for coherently transferring quantum states are needed in order to develop larger scale quantum devices. Here the authors implement an adiabatic transfer protocol in a triple quantum dot and show that dephasing noise can accelerate the process

Externí odkaz: https://doaj.org/article/85584f9f6aaf474983e6dafa66e93d05

Thermally assisted Pauli spin blockade in double quantum dots

Autor: Wataru Izumida, M. Kondo, S. Miyota, Shinichi Amaha, Tsuyoshi Hatano

We investigate the influence of thermal energy on the current flow and electron spin states in double quantum dots in series. The quadruplet Pauli spin blockade, which is caused by the quadruplet and doublet states, occurs at low temperatures affecti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cfb1b167af4323b98d6ccccc8626143c
http://arxiv.org/abs/2103.11627

Coexistence of parallel and series current paths in parallel-coupled double quantum dots in nonlinear transport regime

Autor: Toshihiro Kubo, Shinichi Amaha, Tsuyoshi Hatano, Seigo Tarucha, Yasuhiro Tokura

Publikováno v: Applied Physics Express. 14:105001

We investigated the electron transport properties of parallel-coupled double quantum dot (DQD) devices under magnetic fields. When a low magnetic field was applied, electron tunneling through parallel-coupled DQDs was observed. Under a high magnetic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2fabbbeeff588354ded61925064d038c
https://doi.org/10.35848/1882-0786/ac25c5

Quantum non-demolition measurement of an electron spin qubit

Autor: Tomohiro Otsuka, Giles Allison, Matthieu R. Delbecq, Kento Kawasaki, Daniel Loss, Andreas D. Wieck, Jun Yoneda, Arne Ludwig, Peter Stano, Kenta Takeda, Seigo Tarucha, Akito Noiri, Takashi Nakajima, Shinichi Amaha

Publikováno v: Nature Nanotechnology
Nature Nanotechnology, Nature Publishing Group, 2019, 14 (6), pp.555-560. ⟨10.1038/s41565-019-0426-x⟩

Measurement of quantum systems inevitably involves disturbance in various forms. Within the limits imposed by quantum mechanics, however, one can design an "ideal" projective measurement that does not introduce a back action on the measured observabl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e0dd6b602717a2f5a302c8cdfb711c61
https://hal.archives-ouvertes.fr/hal-02318722

Difference in charge and spin dynamics in a quantum dot-lead coupled system

Autor: Daniel Loss, Tomohiro Otsuka, Andreas D. Wieck, Kenta Takeda, Jun Yoneda, Giles Allison, Matthieu R. Delbecq, Takashi Nakajima, Peter Stano, Shinichi Amaha, Sen Li, Seigo Tarucha, Arne Ludwig, Takumi Ito, Akito Noiri

Publikováno v: Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2019, 99 (8), pp.085402. ⟨10.1103/PhysRevB.99.085402⟩

We analyze time evolution of charge and spin states in a quantum dot coupled to an electric reservoir. Utilizing high-speed single-electron detection, we focus on dynamics induced by the first-order tunneling. We find that there is a difference betwe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12f9f0252de07a683ff84e42a3c50391