Welcome to Ozawa group at Advanced Institute for Materials Research (AIMR) at Tohoku University and RIKEN Center for Interdisciplinary Theoretical and Mathematical Sciences!
We are a theoretical physics research group, mainly focusing at the intersection between condensed matter physics and atomic, molecular, and optical physics. More broadly, we try to do research on what we think is most interesting and important at any given moment.

The group in April, 2026
The group
The group photo of April 2025
The group photo of April 2024
The group photo of April 2023
The group photo of April 2022

What's new

  • June 1, 2026: Alex's single-author paper on non-Hermitian systems with spectral sensitivity to the boundary condition without non-Hermitian skin effect is now on arXiv! arXiv:2605.30978
  • May 25, 2026: Paper on Landau levels under a complex magnetic field is now on arXiv! arXiv:2605.23613
  • May 15, 2026: Paper on how to realize Landau levels on lattices, in collaboration with Temple and Peking Universities, is now published in Physical Review A! Phys. Rev. A 113, L050201 (2026)
  • April 6, 2026: Dr. Rekha Kumari from India joined the group as a Postdoc through the JST LOTUS Programme!
  • April 1, 2026: Paper on Kronig-Penney lattice, in collaboration with OIST, is now published in Physical Review A! Phys. Rev. A 113, 043301 (2026)
  • April 1, 2026: Dr. Alexander Felski joined the group as a JSPS Postdoctoral Researcher! Welcome Alex!
  • April 1, 2026: Tomoki is now in charge of SUURI-COOL Sendai, which is a satellite office of RIKEN iTHEMS inside AIMR.
  • April 1, 2026: Tomoki has become a Team Director of RIKEN iTHEMS! In addition to Tohoku University, we will also be conducting research at RIKEN.
  • February 19, 2026: Paper on quantum geometrical effects in non-Hermitian systems is now published in Physical Review Research! Phys. Rev. Research 8, 013181 (2026)
    Press Release: Max Planck Institute for the Science of Light , Tohoku University, AIMR
  • February 18, 2026: Bruno Mera, a former member and a frequent visitor of our group, has arrived at Sendai and is going to stay with us for the next three months!
  • February 6, 2026: Collaboration with U of Montréal on observation of quantized Hall drift in a photonic Chern insulator is now published in Physical Review X! Phys. Rev. X 16, 011020 (2026)
  • January 13, 2026: Paper in which we characterized the many-body localization through quantum metric is published in Physical Review B! Phys. Rev. B 113, 014306 (2026)
  • December 23, 2025: Experimental collaboration with Kyoto University on realization of topological atom laser is published in Nature Communications!
    Media coverage: Science Japan

You can also read the full list of news of the group