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Summary of the 1-day Workshop on Quantum Gravity

What is spacetime? In order to discuss this fundamental question, we held "1-day Workshop on Quantum Gravity" on July 4, 2019. The talk was very varied. First, Yokokura introduced a formulation of bla...more


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Workshop on Sine-square deformation and related topics 2019

On July 11th, the workshop entitled "Sine-Square Deformation and related topics 2019," was held at RIKEN Wako Campus. Sine-square deformation (SSD) is a new type of boundary condition at which the cou...more


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Report of iTHEMS colloquium - Spacetime Geometry of Black Holes, Wormholes, and Time Machines

General relativity tells us how spacetime is curved by energy distribution and how matter moves in the spacetime. Classical black hole, which is a solution of the classical Einstein equation, has the ...more


Paper of the Week

The KO-valued spectral flow for skew-adjoint Fredholm operators

Spectral flow measures the number of eigenvalue crossings of continuous paths of Fredholm operators (which have finite-dimensional kernels). Atiyah, Patodi and Singer first defined spectral flow as a ...more


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RIKEN-OIST mini Workshop 2019 "Mathematical Condensed Matter Physics"

From July 5 to July 6, RIKEN-OIST mini Workshop 2019, Mathematical Condensed Matter Physics, was held at OIST. We had three excellent lectures and three interesting talks. Prof. Shinobu Hikami gave a ...more


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SOKENDAI-iTHEMS Joint Workshop was held from July 7 to July 8

SOKENDAI-iTHEMS Joint Workshop "Genetics meets Mathematics" was held at Hayama, Kanagawa (close to SOKENDAI Hayama campus) from July 7 to July 8. This workshop brought together 36 participants, includ...more


Paper of the Week

Instantons in Chiral Magnets

More than 50 years ago, Russian physicist Dzyaloshinsky has proposed the specific interaction in some kinds of magnets to explain weak ferromagnetic behavior of them, and soon after that, Professor Mo...more


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Math seminar by Hiroki Kodama

Hiroki Kodama had a seminar talk in the iTHEMS math seminar on 20 June. The topic was the foundation of metric space and its generalizations. Metric space is one of the most primitive setting of geome...more


Paper of the Week

Rigidity of the mod 2 families Seiberg-Witten invariants and topology of families of spin 4-manifolds

After the early 1980s, gauge theory has been used by mathematicians to study 4-dimensional spaces (manifolds). The hottest mathematical subject studied by gauge theory is a sort of difference between ...more



Web page of iTHEMS QCoIn WG has launched.

The web page of iTHEMS QCoIn (Quantum Computation and Information) working group has launched. QCoIn Seminars/workshops, lecture slides and other information are posted there. Feel free to visit ...more



Akinori Tanaka received particle physics medal

Our iTHEMS member, Dr. Akinori Tanaka (AIP/iTHEMS) together with Dr. Akio Tomiya (RIKEN BNL Research Center) have received "14th Particle Physics Medal: Young Scientist Award in Theoretical Particle P...more


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Seminar by Dr. Allard van Marle from UNIST in Shouth Korea

Dr. Allard Jan van Marle visited ABBL and iTHEMS this week from his home institute of UNIST in South Korea. On Monday, June 17, he gave a seminar about his work in astrophysics, on particle accelerati...more


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Seminar by RIKEN researcher, Dr. Nathan Shammah

RIKEN researcher Nathan Shammah gave the first seminar for the QuCoIn (Quantum Computing and Information Science) working group. On June 13, he hosted an interactive workshop on open-source software a...more


Paper of the Week

Probing localization and quantum geometry by spectroscopy

Localization has been one of the main topics of interest in condensed matter physics for more than half a century. Study of localizatoin has recently been entering into a new stage because of the deve...more


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Seminar by Professor Yasunori Nomura from Berkeley

Prof. Yasunori Nomura from Berkeley Center for Theoretical Physics, for which Prof. Nomura serves as the director, gave a seminar entitled " Quantum Mechanics of an Evaporating Black Hole" on June 6th...more


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The Journalist in Residence Workshop 2019 was held from May 31 to June 3

From May 31 to June 3, Journalist in Residence Workshop 2019 was held at Tambara Institute of Mathematical Sciences of the University of Tokyo. As for the "Journalist in Residence (JIR)" program in Ma...more


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Introduction to Black Hole Shadow of M87 by Dr. Yosuke Mizuno

On 24 May (Fri.), Dr. Yosuke Mizuno (Frankfurt U.) visited iTHEMS and gave a 15min talk at iTHEMS coffee meeting. Dr. Yosuke Mizuno is a core member of the Event Horizon Telescope (EHT) project to obs...more


Paper of the Week

Uncovering critical properties of the human respiratory syncytial virus by combining in vitro assays and in silico analyses

When a virion is left in a liquid medium over some time, it loses its ability to infect cells. This is often because the virion surface proteins become deformed, e.g. because of heat or the ionic cont...more


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Report of iTHEMS Special Lecture – How did the Universe Begin? -Inflation Theory & Road to the Proof-

On May 21st, iTHEMS Special Lecture by Dr. Katsuhiko Sato (Professor Emeritus, The University of Tokyo / Director, Research Center for Science Systems, Japan Society for the Promotion of Science) was ...more


Person of the Week

Self-introduction: Keita Mikami

I am Keita Mikami, a research scientist at iTHEMS. My research field is partial differential equations and I work on linear Schrödinger equation. Main subject in the research of linear Schrödinger equ...more