vol. 102 | iTHES

Vol. 102, November 16th, 2015


  • Announcement
  • Upcoming Events
  • Paper of the week

Paper of the week

Jean-Paul Blaizot, Yoshimasa Hidaka, Daisuke Satow


Spectral properties of the Goldstino in supersymmetric Bose-Fermi mixtures

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.


It is our great pleasure to announce that Dr. Akira Furusaki in ithes-cond team
(together with Dr. Shinsei Ryu, Univ. Illinois) received
2015 Nishina Memorial Prize (http://www.nishina-mf.or.jp/prize.html )
by their renowned works on
"Classification Theory of topological insulators and superconductors".
Prize ceremony will be held in Dec.7, 2015.

Congratulations, Akira!!

Anybody who are interested in superconductors may want to watch Akira's? YouTube lectures;.

Upcoming Events

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

"A couple of recent developments in atomistic simulations of solid and soft(bio) matter"
Boero Mauro (Institut de Physique et Chimie des Materiaux de Strasbourg (IPCMS), University of Strasbourg and CNRS, UMR 7504, 23 rue du Loess, F-67034, Strasbourg, France Computational Materials Science Initiative (CMSI) at Dept. of Applied Physics, The University of Tokyo, 7-3-1 Hongo, Tokyo 113-8656, Japan)
Date:November 26th (Thu.) 10 a.m. 11月26日(木)10:00-
Place:Meeting room AB, Laser Science Laboratory 理研 和光キャンパス レーザー棟会議室AB

Abstract: A brief overview on recent advanced computational approaches used in the modeling of amorphous materials and biochemical reactions is presented, along with the most recent applications. The scope is to bring attention on advances in DFT-based techniques to extend the time and size scale of the simulations to a more realistic modeling. At the same time, we wish to underscore the still existing limitations in these methodologies. After inspecting the basic algorithms [1-2], we shall focus on their practical applications in two cases. The first one is represented by phase-change materials (PCM) [3] able to perform quick transitions between a crystal and an amorphous phase for next-generation optical supports (blue ray). The second one is a peculiar enzymatic reaction operated by a specific bacteria (arthrobacterium sp. KI72) able to “digest” synthetic fibers such as nylon-6 oligomers, resulting as byproducts in manufacturing industry [4,5].
[1] M. Boero, A. Bouzid, S. Le Roux, B. Ozdamar, C. Massobrio, Molecular Dynamics Simulations of Disordered Materials: From network glasses to phase change memory alloys, pag. 35-55, Springer, Berlin Heidelberg 2015. ISBN: 978-3-319-15674-3
[2] M. Boero and A. Oshiyama, Car-Parrinello Molecular Dynamics in Encyclopedia of Nanotechnology, pag. 1-10, Springer, Berlin Heidelberg 2015. ISBN 978-94-007-6178-0; DOI: 10.1007/978-94-007-6178-0_100946-1
[3] A. Bouzid, S. Gabardi, C. Massobrio, M. Boero, M. Bernasconi, Phys. Rev. B 91, 184201 (2015)
[4] K. Kamiya, T. Baba, M. Boero, T. Matsui, S. Negoro, Y. Shigeta, J. Phys. Chem. Lett. 5, 1210 (2014)
[5] T. Baba, M. Boero, K. Kamiya, H. Ando, S. Negoro, M. Nakano, Y. Shigeta, Phys. Chem. Chem. Phys. 17, 4492 (2015)

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.

Paper of the week

We evaluate the spectral properties of the Goldstino in a Bose-Fermi mixture of cold atoms and molecules whose dynamics is governed by a supersymmetric hamiltonian. Model independent results are obtained from sum rules obeyed by the spectral function. We carry out specific calculations, at zero and finite temperature, using the Random Phase Approximation, and obtain in particular analytic expressions for the dispersion relation at small momentum. These explicit calculations allow us to pin down more precisely the features of the Goldstino that can be attributed to the supersymmetry alone, together with its spontaneous breaking. The anomalous large effect of the Fermi sea at moderate and large momenta is emphasized.

Spectral properties of the Goldstino in supersymmetric Bose-Fermi mixtures
by Jean-Paul Blaizot, Yoshimasa Hidaka, Daisuke Satow