Tsukasa Tada, the coordinator of iTHEMS, has visited SUURI-COOL Berkeley, last week. During his stay, Tada gave a seminar at the Berkeley Center for Theoretical Physics, which is one of the best group dedicated to particle physics and string theory. He also enjoyed the reunion with three iTHEMS members stationed at Berkeley, Takashi Okada, Jason Chang, and Masahiro Nozaki. All of them were having a great time at Berkeley. We strongly encourage iTHEMS members to visit SUURI-COOL Berkeley and take advantage of the prestigious environment of the University of California, Berkeley, and the Lawrence Berkeley National Laboratory.

On April 25th, iTHEMS Colloquium featured Prof. Keisuke Fujii from Osaka University. Prof. Fujii has just moved to Osaka and started his laboratory for Quantum computing.
Started with quoting Richard Feynman and went on to summarize the history of quantum computing. Then he gave a pedagogical explanation of the principle of quantum computing and the overview of the subject.
Next, among over three hundred papers at Quantum Algorithm Zoo, he singled out Quantum Phase estimation as the most important Algorithm. Prof. Fujii explained the algorithm and told the audience that it has application to Prime factorization, Quantum Chemistry and Quantum simulation as well as Quantum linger system solver, which has relevance to AI.
He then gave the assessment of the current status of quantum computing and future prospect. The lecture was concluded by the exposition of Quantum-classical hybrid algorithm and its application to machine learning. Because of the exciting topic featured, the lecture attracted many keen audience.

By employing a clever approximation, three theoretical physicists at RIKEN (Masaru Hongo and Tatsuhiro Misumi of the iTHEMS and Yuya Tanizaki of the RIKEN BNL Research Center) have calculated the phase diagram for an extension of a system proposed over 30 years ago. In addition to advancing the theory of condensed matter physics, this finding could have practical implications for systems made up of particles with the quantum property of spin.
This research highlighted in a recent article of RIKEN RESEARCH.

Nature Reviews Physics is a new journal, just launched this year, focusing on publishing reviews in the area of physics. Dr. Tomoki Ozawa (iTHEMS Senior Research Scientist) together with Dr. Hannah M. Price (University of Birmingham, UK) wrote a review for Nature Reviews Physics on “synthetic dimension,” which is a recently emerging method for simulating high dimensional models using low dimensional platforms making use of non-spatial degrees of freedom as effective dimensions. The review summarizes the current status of the research of synthetic dimensions with a focus on atomic, molecular, and optical physics, where the method is most actively studied. A figure from the review is also adapted for the cover of the May 2019 issue of Nature Reviews Physics.

Hello, I am Kenta Sato. My major is mathematics, in particular algebraic geometry. In algebraic geometry, we study algebraic varieties, which are defined as the zero sets of polynomial equations. When you hear polynomials, you may imagine polynomials whose coefficients are integers, rational numbers, or complex numbers. But, it sometimes important to consider polynomials whose coefficients are in some other field, for example a field with positive characteristic.

I have been studying polynomials, rings and algebraic varieties over a field with positive characteristic. In particular, I am interested in F-singularities and globally F-regular varieties, which are defined in terms of positive characteristic methods. I also hope to find some application of positive characteristic methods to problems in mathematics and other areas.