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Sophia UniversityGraduate School of HumanitiesGraduate School of Applied Religious StudiesGraduate School of LawGraduate School of EconomicsGraduate School of Languages and LinguisticsGraduate School of Global StudiesGraduate School of Science and TechnologyGraduate School of Global Environmental StudiesGraduate Degree Program of Applied Data SciencesFaculty of TheologyFaculty of HumanitiesFaculty of Human SciencesFaculty of LawFaculty of EconomicsFaculty of Foreign StudiesFaculty of Global StudiesFaculty of Liberal ArtsFaculty of Science and TechnologyCenter for Liberal Education and LearningCenter for Language Education and ResearchCenter for Global Education and DiscoverySRO Research Institutes DivisionAffiliated Research OrganizationsSophia University Junior College Division

理工学部 機能創造理工学科

Researcher List >> Ohtsuki Tomi

Ohtsuki Tomi

NameOhtsuki Tomi
AffiliationSophia University
SectionFaculty of Science and Technology, Department of Engineering and Applied Sciences
Job titleProfessor
DegreeDoctor of Philosophy(The University of Tokyo), 理学修士(東京大学), 理学博士(東京大学)
Research funding number50201976
J-Global ID200901008827204586


I took ph.D on the quantum Hall effect at Univ. Tokyo.
I studied numerical scaling methods while working at PTB Germany as a post doctral fellow.
I developed scaling of the level statistics at Osaka and Toho universities.
After moving to Sophia University, I have been studing the localization and conductance scaling properties. The main focus of recent research is on the topological insulators and superconductors.Tomi Ohtsuki, Doctor of Science (University of Tokyo, 1989), is Professor of physics at Sophia University, Tokyo, where he conducts theoretical and computational researches in condensed matter physics. His recent research focuses on quantum transport phenomena such as the Anderson transition, conductance fluctuations, Hall and spin Hall effects in nanoscale systems. He has taught physics for more than 15 years in several universities and graduate schools. His research has been published by Physical Review Letters, Physical Review B, Physics Reports, and others.
The main classes he has are mechanics, electromagnetics, linear algebra, statistical physics as well as solid state physics.(Subject of research)
Numerical Study of Anderson transitions
spin related quantum transport phenomena

Research Interests

machine learning in condensed matter physics ,physics of non-Hermitian systems ,spintronics ,quantum transport phenomena ,spin ,Scaling theory ,Anderson localization

Research Areas

  • Natural sciences / Mathematical physics and basic theory / 


May 2022
Physical Society of Japan, 2021 Highly cited article,Drawing Phase Diagrams of Random Quantum Systems by Deep Learning the Wave Functions
Tomi Ohtsuki Tomohiro Mano 
Feb 2021
American Physical Society, APS outstanding referee award,United States of America
May 2019
The Physical Society of Japan, 2018 Highly cited article
Tomi Ohtsuki Tomoki Ohtsuki 
Mar 2019
Physical Society of Japan, The 24th Outstanding Paper Award of the Physical Society of Japan,Japan
Tomoki Ohtsuki Tomi Ohtsuki 
Apr 2018
The Physical Society of Japan, 2017 Highly cited article
Tomoki Ohtsuki Tomi Ohtsuki 


Alexey A. Kaverzin   Shunsuke Daimon   Takashi Kikkawa   Tomi Ohtsuki   Eiji Saitoh   
Applied Physics Letters      May 2024
Tilen Čadež   Barbara Dietz   Dario Rosa   Alexei Andreanov   Keith Slevin   Tomi Ohtsuki   
Physical Review B   108(18)    Nov 2023   [Refereed]
Tong Wang   Zhiming Pan   Keith Slevin   Tomi Ohtsuki   
Physical Review B   108(14)    Oct 2023   [Refereed]
Kohei Kawabata   Zhenyu Xiao   Tomi Ohtsuki   Ryuichi Shindou   
PRX Quantum   4(4)    Oct 2023   [Refereed]
Zhenyu Xiao   Kohei Kawabata   Xunlong Luo   Tomi Ohtsuki   Ryuichi Shindou   
Physical Review Letters      Aug 2023   [Refereed]


53(8) 447-454   Aug 2018   [Refereed][Invited]
We review the new method of obtaining the phase diagrams of quantum phase transitions in random electron systems. The method is based on the image recognition using the multilayer convolutional neural network, deep learning. Applications to the An...
大学の物理教育   24(2) 42-42   Jul 2018   [Refereed][Invited]
人工知能   33(4) 429-434   Jun 2018   [Refereed][Invited]
Ohtsuki Tomi   Kobayashi Koji   Sacksteder Vincent   
RIMS Kokyuroku   1970 90-95   Nov 2015
日本物理学会誌   70(7) 505-505   Jul 2015   [Refereed][Invited]

Books and Other Publications

大槻 東巳(Part:Joint author, p. 13-30 (第1章))
朝倉書店   10 Oct 2019   (ISBN:9784254131291)   
Ohtsuki Tomi(Part:Joint author, 109-157)
Wiley-Scrivener   9 Apr 2019   (ISBN:9781119407294)   
Topological properties are sometimes emergent or enforced by the breaking of translational invariance. Here, in this chapter we discuss dimensional crossover of topological properties in thin films of topological insulators (TI) and Weyl semi- met...
Ohtsuki Tomi(p.109-157)
Wiley online library   12 Mar 2019   (ISBN:9781119407317)   
Ohtsuki Tomi(Part:Joint author, 86-110)
Oxford University Press   18 Jul 2012   (ISBN:9780199592593)   
大槻 東巳(Part:Joint author, 295-305)
朝倉書店   10 May 2012   (ISBN:9784254131031)   

Professional Memberships

American Physical Society

Research Projects

Foundation of "Machine Learning Physics" --- Revolutionary Transformation of Fundame ntal Physics by A New Field Integrating Machine Learning and Physics
Japan Society for the Promotion of Science: Grants-in-Aid for Scientific Research Grant-in-Aid for Transformative Research Areas (A)
Project Year: Jun 2022 - Mar 2027
Frontiers of Condensed Matter Physics Pioneered by Neural Network
Japan Society for the Promotion of Science: Grants-in-Aid for Scientific Research Grant-in-Aid for Transformative Research Areas (A)
Project Year: Jun 2022 - Mar 2027
日本学術振興会: 科学研究費助成事業 基盤研究(B)
大江 純一郎 大槻 東巳 河野 浩 安立 裕人 
Project Year: Apr 2021 - Mar 2026
Scaling theories of random quantum systems
Japan Society for the Promotion of Science: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)
Project Year: Apr 2019 - Mar 2024
Materials Design and Exploration of Functions for Strongly Correlated Materials - Challenges to Non-equilibrium and Non-Periodic Systems
Japan Society for the Promotion of Science: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (S)
IMADA Masatoshi 
Project Year: May 2016 - Mar 2021


As the head of the curriculum committee for English for science and engineering program, I have organized more than 30 classes, and prepared electronic lecture materials. I also taught physics classes myself using DVD and other electronic lecture materials.
Apr 1995 - Sep 2006