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iTHEMS Weekly News Letter

Upcoming Events

Special Lecture

iTHEMS x academist Online open to the public "Mathematical science world"

April 18 at 10:00 - 17:00, 2020

Dr. Yuki Yokokura (Senior Research Scientist, iTHEMS)
Dr. Ryosuke Iritani (Research Scientist, iTHEMS)
Dr. Hirotaka Irie (Visiting Scientist (Industry), iTHEMS)
Dr. Nagisa Hiroshima (Visiting Scientist (Academia), iTHEMS)
Dr. Hiroyasu Miyazaki (Special Postdoctoral Researcher, iTHEMS)
Dr. Akinori Tanaka (Senior Research Scientist, iTHEMS)

Venue: Register at the link below to participate.

Event Official Language: Japanese


DMWG seminar

Characterizing the continuous gravitational-wave signal from boson clouds around Galactic isolated black holes

April 27 at 16:00 - 17:00, 2020

Dr. Sylvia Zhu (Postdoctoral Researcher, Deutsches Elektronen-Synchrotron DESY, Germany)

Bosons such as axions or axion-like particles can form enormous clouds around black holes via the superradiance instability. As the bosons annihilate in the presence of the black hole, they produce a long-lived, slowly-evolving continuous gravitational-wave signal that is potentially detectable using the current generation of gravitational-wave interferometers.A non-detection can disfavor the existence of axions in certain mass ranges, although this is highly dependent on the Galactic black hole population. In this talk, I will discuss the expected annihilation signal from the population of isolated stellar-mass black holes in the Galaxy, and the prospects for detecting the signal using standard searches for continuous gravitational waves.

Venue: via Zoom

Event Official Language: English


iTHEMS Colloquium

Emergence of life in an inflationary universe

May 11 at 15:30 - 17:00, 2020

Dr. Tomonori Totani (Professor, Department of Astronomy, The University of Tokyo)

Venue: via Zoom

Event Official Language: English

Person of the Week

Mr. Hui Tong thumbnail

Self-introduction: Hui Tong


My name is Hui Tong, a PhD student from School of Physics, Peking University. My main research topic is nuclear theory, including the interactions between nucleons and using the ab-initio nuclear many-body theory to study nuclear matter and neutron star. Now I am studying on how to extract hadron interactions from lattice QCD calculations. In the iTHEMS, I hope to learn more about theoretical, mathematical and computational sciences, this will be a great opportunity to broaden my horizons.

Person of the Week

Dr. Naomi Tsuji thumbnail

Self-introduction: Naomi Tsuji


I am Naomi Tsuji, a postdoctoral researcher at RIKEN/iTHEMS. My major is observational studies of high energy astrophysical phenomena. I have been working on particle acceleration and nonthermal radiation in shock waves of supernova remnants by using X-ray observations. I also analyze TeV gamma-ray data, as a member of H.E.S.S. (High Energy Spectroscopic System) collaboration.

Person of the Week

Dr. Kengo Kikuchi thumbnail

Self-introduction: Kengo Kikuchi


I’m Kengo Kikuchi, a special postdoctoral researcher in iTHEMS. I’m studying the theoretical physics, elementally particle physics and quantum field theory, especially, gradient flow equation. I’d like to take the opportunity working in iTHEMS to broaden research fields, and it would lead to the new interaction with various study regions.

Paper of the Week

Week 3 of April


Title: Hybrid Quantum Annealing via Molecular Dynamics
Author: Hirotaka Irie, Haozhao Liang, Takumi Doi, Shinya Gongyo, Tetsuo Hatsuda

Title: Firewall From Effective Field Theory
Author: Pei-Ming Ho, Yuki Yokokura

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