Vol.20, January 1st, 1970


  • S=k log W
  • Upcoming Event
  • Event Report
  • Person of the Week
  • Visitors

Person of the week

Shigehiro Nagataki



From the Office

The office of iTHES assistant, Ms.Chikako Oota is situated at the first floor of the main research building, room # 159. The extension number is 3185. She will be at the office from 10 a.m. to 16 p.m. except on Wednesday.

S=k log W

One hundred and seventy years ago today, Ludwig Eduard Boltzmann was born in Vienna, then the capital of the Austrian Empire. The title of this column shown above is the famous entropy formula, which is inscribed in front of his tombstone.

Upcoming Event

Event Report


Dr. Yuji Sugita of Theoretical Molecular Science Laboratory gave a colloquial introduction to an audience including physicists at Theoretical Biology Laboratory on February 14th. He briefly overviewed various methods used in the field of computational biochemistry. He went on to explain his ambition to simulate the mechanism of a whole cell. Toward that goal, his achievments on the simulation of proteins on the membrane structure and the simulation consists of twelve million atoms on K- computer were expounded.

Person of the Week


Shigehiro Nagataki

In the universe, there are a lot of mysterious phenomena and objects, including the universe itself. When we face on these things, we cannot help but to think these are far beyond human knowledge. However, we, Astrophysicists, do not regard them as too mysterious or far beyond human knowledge. Rather, we try to understand them by human intelligence. This is called as Astrophysics.
I am a theoretical astrophysicist. I came to RIKEN last year (FY2013) as an associate chief scientist. I am a PI of Astrophysical Big Bang Laboratory. Our group focuses on unveiling the many mysteries surrounding astrophysical explosive phenomena such as supernovae and gamma-ray bursts. Supernovae and gamma ray bursts are the most dreadful bombs in the universe, and yet very little about their explosion mechanisms are known. These astrophysical big bangs continue to fascinate us with their unknown physics and puzzling astronomical phenomena (e.g. gravitational waves, r-process nucleosynthesis, particle acceleration, high-energy neutrinos, ultra high-energy cosmic rays, gamma-ray emission, etc). Through our theoretical and computational endeavors, we strive to reveal the complete pictures of these violent explosions and provide state-of-the-art physical interpretations and predictions for future observations by the next-generation astronomical observatories. We are more than passionate to co-operate with RIKEN researchers including iTHES members of course, as well as all other interested groups in Japan and the World, and together we would like to establish a Utopia for researchers in RIKEN.



Prof. Lembit Sihver
(Chalmers University of Technology, SWEDEN)
Nuclear Science and Engineering
Jan.20th - March 20th, 2014
room 302 (3rd floor, RIBF building)


Prof. Igor Shovkovy
(Arizona State University)
physics of graphene, quantum field theory,
dense matter in nuclear/particle physics.
March 2 - March 15, 2014
room 433 (4th floor, main research building)


Prof. Gordon Baym
(Univ. Illinois at Urbana-Champaign)
cold atom physics, condensed matter physics,
dense matter and neutron stars
March 18 - April 10, 2014
room 433 (4th floor, main research building)