Seminar
Nambu-Goldstone fermion in a Bose-Fermi mixture with an explicitly broken supersymmetry
August 7 at 13:00 - 14:30, 2020
Dr. Hiroyuki Tajima (PhD, Department of Natural Science, Kochi University)
Supersymmetry, which is a symmetry associated with interchange between bosons and fermions, is one of the most important symmetries in high-energy physics but its evidence has never been observed yet....more
Venue: via Zoom
Event Official Language: English
Heavy tails in the brain
August 5 at 10:00 - 11:00, 2020
Dr. Lukasz Kusmierz (research scientist, RIKEN Center for Brain Science)
In my talk I will discuss the relation between two seemingly unrelated measures in the brain that exhibit heavy tails: neuronal avalanches, i.e. bursts of activity with power-law distributions of size...more
Venue: via Zoom
Event Official Language: English
Stability of ferromagnetism in many-electron systems
July 31 at 16:00 - 18:10, 2020
Prof. Tadahiro Miyao (Associate Professor, Department of Mathematics, Faculty of Science, Hokkaido University)
First part Title: Stability of ferromagnetism in many-electron systems Abstract: I construct a model-independent framework describing stabilities of ferromagnetism in strongly correlated electron...more
Venue: via Zoom
Event Official Language: English
Time-dependent bias emerges in population models with broad offspring number distributions
July 29 at 10:00 - 11:00, 2020
Dr. Takashi Okada (Senior Research Scientist, iTHEMS)
It has been increasingly recognized that natural populations exhibit broad offspring number distributions, either because offspring numbers are strongly variable (e.g. marine organisms) or because ran...more
Venue: via Zoom
Event Official Language: English
DMWG special seminar : “The result of the XENON1T experiment and its implications”
July 22 at 15:30 - 17:00, 2020
Dr. Masaki Yamashita (Associate Professor, Cosmic-ray Research Division, Institute for Space–Earth Environmental Research, Nagoya University)
Venue: via Zoom
Event Official Language: Japanese
Human Time vs. Mouse Time in Embryonic Development
July 17 at 16:00 - 17:00, 2020
Dr. Miki Ebisuya (Group Leader, European Molecular Biology Laboratory, Barcelona, Spain)
Different species have different tempos of development: larger animals tend to grow more slowly than smaller animals. My group has been trying to understand the molecular basis of this interspecies di...more
Venue: via Zoom
Event Official Language: English
Topological data analysis from a practical and mathematical perspective
July 15 at 16:00 - 18:10, 2020
Dr. Yuichi Ike (Researcher, Artificial Intelligence, FUJITSU LABORATORIES LTD.)
1. Topological data analysis and its applications In this talk, I will explain some methods in topological data analysis (TDA) and their applications. First I recall persistent homology, which is a ...more
Venue: via Zoom
Event Official Language: English
Application of geometry to protein structure analysis
July 15 at 14:00 - 15:00, 2020
Ms. Haru Negami-Oono (PhD Student, Institute for Biology and Mathematics of Dynamic Cellular Processes, The University of Tokyo)
Geometry is applied in various fields as a method for revealing the structure of data. In this seminar, I will introduce the topological method, fatgraph model, to classify protein structures. I will ...more
Venue: via Zoom
Event Official Language: English
Search for ultralight dark matter with laser interferometric gravitational wave detectors
July 13 at 10:00 - 11:00, 2020
Dr. Yuta Michimura (assistant professor, Department of Physics, The University of Tokyo)
Venue: via Zoom
Event Official Language: English
Complex Langevin study of an attractively interacting two-component Fermi gas in 1D with population imbalance
July 10 at 13:30 - 14:30, 2020
Dr. Shoichiro Tsutsui (Postdoctral Researchers, Quantum Hadron Physics Laboratory, RIKEN)
We investigate an attractively interacting two-component Fermi gas in 1D described by the Gaudin-Yang model with population imbalance. While the Gaudin-Yang model is known as a solvable model based on...more
Venue: via Zoom
Event Official Language: English
Constrained evolution of animal embryogenesis
July 8 at 10:00 - 11:00, 2020
Dr. Yui Uchida (RIKEN Special Postdoctoral Researcher, Laboratory for Multiscale Biosystem Dynamics, RIKEN BDR)
Animals have developed a great variety of morphologies during the course of evolution. Despite this, phylogeny-specific features have sometimes been maintained for hundreds of millions of years, sugge...more
Venue: via Zoom
Event Official Language: English
Waveform Analysis of Biological Rhythms
July 1 at 10:00 - 11:00, 2020
Dr. Shingo Gibo (Postdoctoral Researcher, iTHEMS)
Nonlinear oscillatory phenomena often emerge in various systems, for example circadian rhythms in biological systems and acoustic vibrations in engineering. Analysis and control of these oscillatory p...more
Venue: via Zoom
Event Official Language: English
Universal Error Bound for Constrained Quantum Dynamics
June 24 at 16:00 - 18:10, 2020
Dr. Ryusuke Hamazaki (Senior Research Scientist, iTHEMS)
In quantum mechanics, the existence of large energy gaps allows us to trace out the degrees of freedom of irrelevant energy scale. Consequently, we can treat a system within a constrained subspace obt...more
Venue: via Zoom
Event Official Language: English
Dark Matter Heating vs. Rotochemical Heating in Old Neutron Stars
June 22 at 16:00 - 17:00, 2020
Prof. Koichi Hamaguchi (Associate professor, School of Science, The University of Tokyo)
*Detailed information about the seminar refer to the email
Venue: via Zoom
Event Official Language: English
Information geometry of operator scaling
June 17 at 16:00 - 18:10, 2020
Dr. Tasuku Soma (Research Associate, Graduate School of Information Science and Technology, The University of Tokyo)
Matrix scaling is a classical problem with a wide range of applications. It is known that the Sinkhorn algorithm for matrix scaling is interpreted as alternating e-projections from the viewpoint of cl...more
Venue: via Zoom
Event Official Language: English
Field theoretical approach to relativistic hydrodynamics
June 12 at 13:00 - 14:30, 2020
Dr. Masaru Hongo (Visiting Scientist (Academia), iTHEMS)
Hydrodynamics is a low-energy effective theory of a conserved charge density, which describes a long-distance and long-time behavior of many-body systems. It is applicable not only to a non-relativist...more
Event Official Language: English
The effect of the early kinetic decoupling in a fermionic dark matter model
June 12 at 10:00 - 11:00, 2020
Dr. Tomohiro Abe (Assistant Professor, Division of Theoretical Studies, Kobayashi-Maskawa Institute for the Origin of Particles and the Universe (KMI), Nagoya University)
*Detailed information about the seminar refer to the email
Venue: via Zoom
Event Official Language: English
Turing Patterns in Biology and Beyond
June 10 at 10:00 - 10:45, 2020
Dr. Martin Skrodzki (Visiting Researcher, iTHEMS)
In his 1952 paper "The chemical basis of morphogenesis", Alan M. Turing presented a model for the formation of skin patterns. While it took several decades, the model has been validated, e.g. in the s...more
Venue: via Zoom
Event Official Language: English
Quantification model of energy of loop structure on biopolymer
June 3 at 10:00 - 10:45, 2020
Dr. Hiroshi Yokota (Postdoctoral Researcher, iTHEMS)
During cell division, the chromatin fiber condenses into a rod-like shape, which is the so-called chromosome. The chromosome is constructed by consecutive chromatin loop structures whose excluded volu...more
Venue: via Zoom
Event Official Language: English
Localization and universality in non-Hermitian many-body systems
May 29 at 15:00 - 16:30, 2020
Dr. Ryusuke Hamazaki (Senior Research Scientist, iTHEMS)
Recent study on isolated quantum many-body systems have revealed two different phases distinguished by their dynamics and spectral statistics. One is an ergodic phase whose spectral statistics exhibit...more
Venue: via Zoom
Event Official Language: English