iTHEMS Weekly News Letter

Hot Topic

Dr. Tomoki Ozawa thumbnail

Farewell note from Dr. Tomoki Ozawa


Hello. My name is Tomoki Ozawa. I am a senior research scientist at RIKEN iTHEMS. As of February, I am leaving iTHEMS and moving to Advanced Institute for Materials Science (AIMR) in Tohoku University, Sendai, to start my own group as an associate professor.

I joined iTHEMS on April 2018; I cannot believe that it has already been almost two years. Time really flies like an arrow. Before joining iTHEMS, my research career has been developed abroad (US, Italy, Belgium), and although I am a native of Japan, iTHEMS is the first Japanese affiliation I obtained as a researcher. Before coming back to Japan, I had always been worried if I could be accepted to the Japanese academic community. After joining iTHEMS, I learned that my worries were needless. I was surprised by the welcoming atmosphere of iTHEMS, and even though I was the only condensed matter physicist in iTHEMS, I could easily find somebody to discuss in the iTHEMS coffee room. What helped me even more to place myself in Japan were the various satellite offices of iTHEMS in (and also outside) Japan. These satellite offices made it easy for me to visit and know what is going on in various other places in Japan. After spending almost two years in iTHEMS, although I am still constantly surprised by cultural differences between Japan and other places I have been, I feel that I have comfortably become a part of the academic community in Japan.

In terms of research, what was great being in iTHEMS was that I could do whatever research I wanted to do, without any pressure on the selection of topic or to report what I am doing to my boss. I really appreciated the academic freedom here. I am also starting to build collaborations in Japan. The new collaborations I am building are quite interdisciplinary (including atomic physics, photonics, and even biophysics), thanks to the wide scope of interests of people in iTHEMS.

It has been a real pleasure to spend time in the beginning period of iTHEMS, and I am sure that iTHEMS will flourish even more in the coming years. AIMR has a satellite office of iTHEMS, and I expect to maintain active interactions with iTHEMS after I move to AIMR. I will also most likely come to iTHEMS offices (perhaps the coffee room in Wako) from time to time, and I am looking forward to seeing the successful development of iTHEMS in the future.

Hot Topic

Dr. Nagisa Hiroshima thumbnail

Search for gamma-ray signals from dark matter annihilations in extended dwarf spheroidal galaxies, article on the Astronomical Herald


The importance of the dark matter density distribution in target galaxies is discussed under realistic settings of the future gamma-ray experiment.

Seminar Report

Math seminar by Dr. Shu Nakamura


The iTHEMS Math seminar was held on 23 January, inviting Shu Nakamura from Gakushuin university. The title of the talk was “Semiclassical methods in mathematical quantum mechanics”. The topic was semiclassical analysis and scattering theory of Schrödinger operators.
In the first part, the speaker gave a introductory talk on the microlocal analysis and semiclassical analysis of Schrödinger operators. He started his talk by introducing a canonical quantization. Then he explained how canonical quantization is understood in the framework of semiclassical and microlocal analysis. Moreover he explained some recent results on this research field.
In the second part, the speaker explained his recent results on scattering matrix of Schrodinger operators with long range potentials. At the beginning, he introduced the definition of scattering matrix and some known results. Then he stated his main result on the representation of scattering matrix. As an application, he gave some examples of long range potentials for which he proved several spectral properties of scattering matrix.

Upcoming Events


ABBL-iTHEMS Joint Seminar

ABBL/iTHEMS seminar - talk on ultra-high energy cosmic rays

January 31 at 14:00 - 15:00, 2020

Dr. Eiji Kido (Astrophysical Big Bang Laboratory, RIKEN Cluster for Pioneering Research (CPR))

Venue: Seminar Room #132

Event Official Language: English


Dr.  thumbnail

iTHEMS Math Seminar

Solved and open problems regarding the neighborhood grid data structure

February 7 at 16:00 - 18:10, 2020

Dr. Martin Skrodzki (Visiting Researcher, iTHEMS / Fellow, German Academic Scholarship Foundation, Germany)

February 7 at 16:00-17:00 17:10-18:10, 2020

Venue: Seminar Room #160, 1F Main Research Building, RIKEN

Event Official Language: English


The 11th MACS Colloquium thumbnail

MACS ColloquiumSupported by iTHEMSSUURI-COOL (Kyoto)

The 11th MACS Colloquium

February 19 at 15:00 - 17:30, 2020

Prof. Hiroyuki Hata (Professor, Graduate School of Science, Kyoto University)

15:00- Teatime
15:15- Talk by Prof. Hiroyuki Hata
16:40- MACS Report Meeting FY2019

The 11th MACS colloquium is supported by iTHEMS. It will be broadcasted to Wako, but if you can join the colloquium physically in Kyoto, that would be better. iTHEMS provides good confectionery at Kyoto!

Venue: Lecture room #401, Graduate School of Science Building No 6, Kyoto University

Event Official Language: Japanese


iTHEMS Math Seminar

Index of the Wilson-Dirac operator revisited: a discrete version of Dirac operator on a finite lattice

February 25 at 16:00 - 18:10, 2020

Dr. Mikio Furuta (Professor, The University of Tokyo)

Venue: Seminar Room #160, 1F Main Research Building, RIKEN

Event Official Language: English

If you would like to cancel your subscription or change your email address,
please let us know via our contact form.