J
Jun Yoneda
Researcher at Global Alliance in Management Education
Publications - 66
Citations - 2676
Jun Yoneda is an academic researcher from Global Alliance in Management Education. The author has contributed to research in topics: Qubit & Quantum dot. The author has an hindex of 22, co-authored 53 publications receiving 2062 citations. Previous affiliations of Jun Yoneda include University of New South Wales & University of Tokyo.
Papers
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Journal ArticleDOI
A quantum-dot spin qubit with coherence limited by charge noise and fidelity higher than 99.9.
Jun Yoneda,Kenta Takeda,Tomohiro Otsuka,Tomohiro Otsuka,Takashi Nakajima,Matthieu R. Delbecq,Giles Allison,Takumu Honda,Tetsuo Kodera,Shunri Oda,Yusuke Hoshi,Noritaka Usami,Kohei M. Itoh,Seigo Tarucha +13 more
TL;DR: It is revealed that the free-evolution dephasing is caused by charge noise—rather than conventional magnetic noise—as highlighted by a 1/f spectrum extended over seven decades of frequency, offering a promising route to large-scale spin-qubit systems with fault-tolerant controllability.
Journal ArticleDOI
A >99.9%-fidelity quantum-dot spin qubit with coherence limited by charge noise
Jun Yoneda,Kenta Takeda,Tomohiro Otsuka,Takashi Nakajima,M. R. Delbecq,Giles Allison,Takumu Honda,Tetsuo Kodera,Shunri Oda,Yusuke Hoshi,Noritaka Usami,Kohei M. Itoh,Seigo Tarucha +12 more
TL;DR: In this paper, a single-electron spin qubit with isotopically-enriched phase coherence time (20 microseconds) and fast electrical control speed (up to 30 MHz) mediated by extrinsic spin-electric coupling is shown.
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A fault-tolerant addressable spin qubit in a natural silicon quantum dot
Kenta Takeda,J. Kamioka,Tomohiro Otsuka,Jun Yoneda,Takashi Nakajima,Matthieu R. Delbecq,Shinichi Amaha,Giles Allison,Tetsuo Kodera,Shunri Oda,Seigo Tarucha +10 more
TL;DR: This is the first experimental demonstration of a fault-tolerant spin qubit in industry-compatible isotopically natural silicon using a natural silicon double quantum dot with a micromagnet that is optimally designed for fast spin control.
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Fast electrical control of single electron spins in quantum dots with vanishing influence from nuclear spins.
Jun Yoneda,Tomohiro Otsuka,Takashi Nakajima,T. Takakura,Toshiaki Obata,Michel Pioro-Ladrière,Michel Pioro-Ladrière,Hong Lu,Chris Palmstrom,Arthur C. Gossard,Seigo Tarucha +10 more
TL;DR: This work demonstrates fast universal electrical spin manipulation with inhomogeneous magnetic fields and establishes fast z rotations up to 54 MHz by directly controlling the spin phase, which will significantly facilitate tomography and error correction with electron spins in quantum dots.
Journal ArticleDOI
Single to quadruple quantum dots with tunable tunnel couplings
T. Takakura,Akito Noiri,Toshiaki Obata,Tomohiro Otsuka,Jun Yoneda,Kenji Yoshida,Seigo Tarucha +6 more
TL;DR: In this article, a gate-defined quadruple quantum dot with finite inter-dot tunnel couplings was proposed and shown to have gate performance relevant for spin-based four-qubits with controllable exchange couplings.