Tomohiro Otsuka

J-GLOBAL         Last updated: Nov 8, 2018 at 13:26
 
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Name
Tomohiro Otsuka
E-mail
tomohiro.otsukariec.tohoku.ac.jp
URL
http://en.tomootsuka.net/
Affiliation
Tohoku University
Section
Quantum Devices (Otsuka Group), Research Institute of Electrical Communication
Job title
Associate Professor
Degree
Doctor of Science(University of Tokyo)
Other affiliation
Department of Applied Physics, University of TokyoRIKEN (Center for Emergent Matter Science, Quantum Functional System Research Group)Department of Electrical Engineering, School of Engineering, Tohoku UniversityCenter for Spintronics Research Network, Tohoku University
Research funding number
50588019

Research Areas

 
 

Academic & Professional Experience

 
Apr 2018
 - 
Today
Associate Professor, Department of Electrical Engineering, School of Engineering, Tohoku University
 
Apr 2018
 - 
Today
Associate Professor, Center for Spintronics Research Network, Tohoku University
 
Feb 2018
 - 
Today
Visiting Researcher, RIKEN (Center for Emergent Matter Science, Quantum Functional System Research Group)
 
Feb 2018
 - 
Today
Associate Professor, Research Institute of Electrical Communication, Tohoku University (Quantum Devices (Otsuka Group), Information Devices Division)
 
Oct 2016
 - 
Today
Project Researcher, JST, PRESTO
 

Awards & Honors

 
Apr 2018
The Young Scientists’ Prize, The Commendation for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology
 
Mar 2018
Yazaki Memorial Foundation for Science and Technology Research Encouraging Award
 
May 2017
Foundation Advanced Technology Institute Research Encouraging Award
 
Apr 2017
RIKEN CEMS Award
 
Mar 2017
RIKEN Researcher Incentive Award
 

Published Papers

 
Chungheon Baek, Tomohiro Otsuka, Seigo Tarucha, Byung-Soo Choi
   Oct 2018
Fault-tolerant quantum computing demands many qubits with long lifetimes to
conduct accurate quantum gate operations. However, external noise limits the
computing time of physical qubits. Quantum error correction codes may extend
such limits, but ...
Takumi Ito, Takumi Ito, Tomohiro Otsuka, Tomohiro Otsuka, Tomohiro Otsuka, Tomohiro Otsuka, Takashi Nakajima, Takashi Nakajima, Matthieu R. Delbecq, Matthieu R. Delbecq, Matthieu R. Delbecq, Shinichi Amaha, Jun Yoneda, Jun Yoneda, Kenta Takeda, Kenta Takeda, Akito Noiri, Akito Noiri, Giles Allison, Arne Ludwig, Andreas D. Wieck, Seigo Tarucha, Seigo Tarucha, Seigo Tarucha, Seigo Tarucha
Applied Physics Letters   113 093102-1--5   Aug 2018   [Refereed]
© 2018 Author(s). Scaling up qubits is a necessary step to realize useful systems of quantum computation. Here, we demonstrate coherent manipulations of four individual electron spins using a micro-magnet method in each dot of a quadruple quantum ...
Tomohiro Otsuka, Takashi Nakajima, Matthieu R. Delbecq, Peter Stano, Shinichi Amaha, Jun Yoneda, Kenta Takeda, Giles Allison, Sen Li, Akito Noiri, Takumi Ito, Daniel Loss, Arne Ludwig, Andreas D. Wieck, Seigo Tarucha
   Aug 2018
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 be...
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
Nature Communications   9 2133-1--8   May 2018   [Refereed]
© 2018 The Author(s). Quantum coherence of superposed states, especially of entangled states, is indispensable for many quantum technologies. However, it is vulnerable to environmental noises, posing a fundamental challenge in solid-state systems ...
A. Noiri, T. Nakajima, J. Yoneda, M. R. Delbecq, P. Stano, T. Otsuka, K. Takeda, S. Amaha, G. Allison, K. Kawasaki, A. Ludwig, A. D. Wieck, D. Loss, S. Tarucha
   Apr 2018
Single-spin qubits in semiconductor quantum dots proposed by Loss and
DiVincenzo (LD qubits) hold promise for universal quantum computation with
demonstrations of a high single-qubit gate fidelity above 99.9 % and two-qubit
gates in conjunction wi...

Conference Activities & Talks

 
Speed up of quantum dot charge sensing utilizing Bayesian estimation
Tomohiro Otsuka, Shuya Nagayasu, Takashi Nakajima, Matthieu R. Delbecq, Jun Yoneda, Kenta Takeda, Akito Noiri, Sen Li, Takumi Ito, Seigo Tarucha
International Conference on the Physics of Semiconductors   30 Jul 2018   
Different charge and spin dynamics in a quantum dot-lead coupled system
Tomohiro Otsuka, Takashi Nakajima, Matthieu R. Delbecq, Peter Stano, Shinichi Amaha, Jun Yoneda, Kenta Takeda, Giles Allison, Akito Noiri, Takumi Ito, Daniel Loss, Arne Ludwig, Andreas D. Wieck, and Seigo Tarucha
International Symposium on Dynamics in Artificial Quantum Systems   15 Jan 2018   
Probing Dynamics of Local Electronic States in Nanostructures Utilizing Fast Quantum Dot Probes
Tomohiro Otsuka, Takashi Nakajima, Matthieu R. Delbecq, Shinichi Amaha, Jun Yoneda, Kenta Takeda, Giles Allison, Peter Stano, Akito Noiri, Takumi Ito, Daniel Loss, Arne Ludwig, Andreas D. Wieck, and Seigo Tarucha
International Symposium on Fluctuation and Structure out of Equilibrium   21 Nov 2017   
Four Single-spin Rabi Oscillations in a Quadruple Quantum Dot
Takumi Ito*, Tomohiro Otsuka*, Takashi Nakajima, Matthieu R. Delbecq, Shinichi Amaha, Jun Yoneda, Kenta Takeda, Akito Noiri, Giles Allison, Arne Ludwig, Andreas D. Wieck, and Seigo Tarucha
International Conference on Electronic Properties of Two Dimensional Systems   3 Aug 2017   
Difference in Charge and Spin Dynamics in a Quantum Dot-Lead Hybrid System
Tomohiro Otsuka, Takashi Nakajima, Matthieu R. Delbecq, Peter Stano, Shinichi Amaha, Jun Yoneda, Kenta Takeda, Giles Allison, Akito Noiri, Takumi Ito, Daniel Loss, Arne Ludwig, Andreas D. Wieck, and Seigo Tarucha
International Conference on Electronic Properties of Two Dimensional Systems   1 Aug 2017   

Education

 
Apr 2007
 - 
Mar 2010
Ph.D. course, Department of Physics, University of Tokyo (ISSP Katsumoto Lab)
 
Apr 2005
 - 
Mar 2007
Master course, Department of Physics, University of Tokyo (ISSP Katsumoto Lab)
 
Apr 2003
 - 
Mar 2005
Department of Physics, University of Tokyo