vol. 99 | iTHES

Vol. 99, October 27th, 2015


  • Announcement
  • Upcoming Events
  • Event report
  • Person of the week

Person of the week

Shinya Wanajo



From the Office

The office of iTHES assistant, Ms.Chikako Oota is situated at the second floor of the main research building, room # 246. The extension number is 3261. She will be at the office from 10 a.m. to 16 p.m.


Dr. Masato Taki (ithes-phys) and Dr. Kazunobu Maruyoshi(Imperial College London)
have received
2015 Particle Physics Medal: Young Scientist Award in Theoretical Particle Physics
(Japan Particle and Nuclear Theory Forum) by their contribution,
"Deformed Prepotential, Quantum Integrable System and Liouville Field Theory”,
Nuclear Physics B841 (2010) 388 [http://arxiv.org/abs/1006.4505 ].

Congratulations Masato!

For iTHES, this is a consecutive winning of the Medal from last year by
Dr. Takuya Kanazawa (ithes-phys) with Dr. T. Misumi (Keio Univ.)
"Adjoint QCD on R3 x S1 with twisted fermionic boundary conditions"
Journal of High Energy Physics 1406 (2014) 181 [http://arxiv.org/abs/1405.3113 ].

Upcoming Events

13th iTHES Colloquium

November 10th (Tue.) 15:00-
"Complex Systems Modeling and its Applications"
Prof. Kazuyuki Aihara (The University of Tokyo)
Place: 2F Large mtg.rm, Main Cafeteria (Bldg. C61)
In this talk, I review our recent reseach on complex systems modeling and its transdisciplinary applications. First, I explain about a platform for mathematical modeling of complex systems, based on complex systems control theory, complex network theory, and big data analysis. Second, I illustrate examples of its transdisciplinary applications such as dynamical network biomarkers for preemptive medicine, transitive dynamics of the primate prefrontal cortex, and an electronic AD converter with beta expansion.

"The helium Efimov trimer and larger bosonic droplets"
Prof. Doerte Blume (Washington State University)
Date: Nov. 12th (Thursday) 2015 (14:00-)
Place: Main research building, 2th floor, 224
Language: English

The quantum mechanical three-body problem has been studied extensively for about a century. The helium atom (two electrons and a nuclues) and the molecular hydrogen ion (two protons and one electron) are textbook examples that illustrate the organization of the periodic table and molecular binding mechanisms, respectively. In 1970 Vitaly Efimov predicted a rather different and counterintuive quantum mechanical three-body binding mechanism that leads to an infinite series of stable three-body states of enormous spatial extents. These Efimov states are predicted to exist for short-range interactions like the van der Waals force between atoms or the strong force between nucleons. When the potential becomes so shallow that the last two-body bound state is at the verge of becoming unbound or is unbound, then three particles stick together to form Efimov states. This talk will review recent theoretical and experimental advances in this field. The observation of the helium trimer (three neutral helium atoms) Efimov state and extensions of the Efimov scenario to four- and higher-body systems will be discussed.

Detailed information can also be found in

Osaka CTSR - Kavli IPMU - RIKEN iTHES International workshop
"Nambu and science frontier"

Date: 17th November (Tue), 2015
Venue: H701 lecture room, Dept. of Physics, Osaka university
Time: 9:30 - 17:30

Invited speakers
Kenji Fukushima (U. Tokyo)
Koji Hashimoto (Osaka U)
Simeon Hellerman (Kavli IPMU)
Noriyoshi Ishii (Osaka U)
Kota Masuda (RIKEN iTHES)
Yu Nakayama (Kavli IPMU / Caltech)
Toshifumi Noumi (Hong Kong U. of Science and Technology / RIKEN iTHES)
Kin-ya Oda (Osaka U)
Noriaki Ogawa (RIKEN iTHES)
Haruki Watanabe (MIT)
Tamiaki Yoneya (U. Tokyo, Open Univ. of Japan)

Koji Hashimoto, Kentaro Nagamine (Osaka CTSR)
Tetsuo Hatsuda, Tsukasa Tada, Masato Taki (RIKEN iTHES)
Hitoshi Murayama (Kavli IPMU)

Purpose of the Workshop:
In July 2015, we as the physics community were greatly saddened by the news that Prof. Yoichiro Nambu had passed away. He proposed many of the fundamental concepts that underlie our current understanding in theoretical sciences. On this occasion, we’d like to discuss the relevance of Nambu’s concepts and how they will be developed in many areas of science, and promote interdisciplinary collaborations among theoretical sciences. The joint workshop of Osaka CTSR- RIKEN iTHES - Kavli IPMU is a successive series following the symposium held at Kavli IPMU last year.
The topic of the workshop includes:
- Nambu-Goto action for strings, membranes and higher dim. objects
- Nambu-Goldstone theorem and its extensions
- Nambu-Jona-Lasinio model and its generalizations
- Nambu-Bethe-Salpeter equation and nuclear/hadron physics
- Nambu bracket for quantizing membrane and M-theory
- Higgs inflation
- QCD chiral phase transition
- Symmetry breaking in physical biology

Sponsored by
- Core for Theoretical Science Research (CTSR) , Osaka Univ.
- Interdisciplinary Theoretical Science (iTHES) Research Group, RIKEN
- Kavli IPMU, The Univ. of Tokyo

The 7th iTHES Academic-Industrial Innovation Lecture

"Autonomous Car and Artificial Intelligence"
Dr. Toshiki Kindo (TOYOTA)
Date: Nov. 20(Fri.) 13:30-16:00
Place: Okochi Hall, Wako, RIKEN
(Lecture is given in Japanese.)

#16 Pioneer project seminar

"Precision Tests of Discrete symmetries at Low Energies"
Prof. Klaus Jungmann (University of Groningen)
Date: Nov. 24th (Tuesday) 2015 (10:00-11:00)
Place: Main research building, 5th floor, 535,537
Language: English

Fundamental Physics Using Atoms 2015
- Towards better understanding of our matter universe -

Nov. 30 (Mon.) -- Dec. 1 (Tue.), 2015
Oral sessions: RIKEN Wako, Okochi Hall (C32)
Poster sessions: Welfare and Conference Bldg. 2F (C61)

Recently much effort has been directed to investigation of the fundamental physics which exploits remarkable developments in atomic physics and/or quantum optics techniques. Examples include (A) test of the time reversal invariance by observing permanent electric dipole moments of atoms or molecules, (B) neutrino mass spectroscopy using atoms, (C) measurement of fine structure constant's time dependence with precession atomic clock etc. This conference aims to bring together recent research results, to discuss future prospects, and to expand research network, making this field more active and productive.

Event report

The 6th iTHES Academic-Industrial Lecture was taken place on October 22nd inviting Dr. Hironori Kokubo from The Shonan Research Center, Takeda Pharmaceuticals, Co. Ltd. , as a lecturer.
Dr. Kokubo started with the introduction of his laboratory located near Kamakura, where 2400 personnel is working on the site. It may sound huge, but he also explained that the pharmaceutical industry in Japan spends on R&D in the amount comparative to the whole MEXT grant-in-aid grant. He continued to elucidate the current status of the industry and the drugs in general.
His main topic was how to discover new drugs and how computational chemistry can contribute to the cause.He illustrated the calculations based on molecular dynamics to seek binding energies between the target proteins and the prospective ligand, which is supposed to attach to the target protein and hinder the effect. He stressed that in the application to the discovering drugs, one needs to be mindful of the limitation of time and computational resources. He also commented on the difference of research life in industry and academia.

The lecture, which lasted almost two hours, attracted a wide range of researchers, about 40 in number.

Person of the week

I am Shinya Wanajo, a former iTHES research scientist (from 2014 May to 2015 September). I have moved to Sophia University (near the Yotsuya station) in the end of September and now am a visiting scientist of the iTHES group. I have courses of fundamental physics in English classes at the university in addition to a Japanese course of cosmo-science. I still have been struggling for the lectures with students from various countries with different educational levels. Indeed, my fruitful experiences with all the iTHES members in its quite international atmosphere definitely help me in such times. On the other hand, my collaborations in iTHES, including the study of r-process and the Cosmo-AI project, have just started and yet to be advanced. I will try to visit RIKEN every (or once every two) Friday for keeping this important collaborations. I would like to thank all of you for great days at RIKEN and to see you soon at the iTHES coffee meeting!