RIKEN Interdisciplinary Theoretical and
Mathematical Sciences Program

Seeking a few Postdoctoral Researchers (W21169)

Deadline: Open until filled

Postdoctoral Researcher, a few positions. In particular, we welcome applications from young researchers who are interested in exploring theories of quantum gravity in a broad sense. Currently, Senior Research Scientist Yuki Yokokura is affiliated with iTHEMS, and we expect young researchers with complementary and unique expertise, who are willing to pursue their own ambitious motivation and create synergy among the members.

Seeking a few Postdoctoral Researchers (RIKEN-Berkeley Fellow associated with N3AS) (W21157)

Deadline: Open until filled

Postdoctoral Researcher (RIKEN-Berkeley Fellow associated with N3AS), a few positions. Theoretical works associated with neutrino physics, nucleosynthesis, dense matter and neutron stars, dark matter, astrophysical simulations and related fields.

Seeking a few Postdoctoral Researchers (W21158)

Deadline: Open until filled

Postdoctoral Researcher, a few positions. In particular, the successful applicant(s) are expected to spend at least 50% of their time working with Dr. Ryosuke Iritani carrying out interdisciplinary research addressing fundamental questions in population genetics, phylogenetics, and bioinformatics, by using mathematical and theoretical approach in dynamical systems, stochastic process, statistical physics, and/or information theory. Applicants are expected to have a considerable expertise in those theories.

Seeking a Female Research Scientist or a Female Senior Research Scientist (W21071)

Deadline: Open until filled

Female Research Scientist or Female Senior Research Scientist, a few positions. Seeking a female researcher or a female senior researcher to conduct theoretical research in the fields of natural sciences, mathematical sciences, or humanities and social sciences.

2022-01-27

Paper of the Week

Week 5, January 2022

Title: Gopakumar-Vafa type invariants of holomorphic symplectic 4-folds Author: Yalong Cao, Georg Oberdieck, Yukinobu Toda arXiv: http://arxiv.org/abs/2201.10878v1 Title: Universal Properties of Weakly Bound Two-Neutron Halo Nuclei Author: Masaru Hongo, Dam Thanh Son arXiv: http://arxiv.org/abs/2201.09912v1 Title: On the evolution of the Hubble constant with the SNe Ia Pantheon Sample and Baryon Acoustic Oscillations: a feasibility study for GRB-cosmology in 2030 Author: Maria Giovanna Dainotti, Biagio De Simone, Tiziano Schiavone, Giovanni Montani, Enrico Rinaldi, Gaetano Lambiase, Malgorzata Bogdan, Sahil Ugale arXiv: http://arxiv.org/abs/2201.09848v2 Title: Foundations and Applications of Quantum Kinetic Theory Author: Yoshimasa Hidaka, Shi Pu, Qun Wang, Di-Lun Yang arXiv: http://arxiv.org/abs/2201.07644v1 Title: Global study of the scalar quasi-normal modes of Kerr-AdS${}_5$ black holes: Stability, thermality, and horizon area quantization Author: Issei Koga, Naritaka Oshita, Kazushige Ueda arXiv: http://arxiv.org/abs/2201.07267v1

2022-01-25

Seminar Report

NEW WG Seminar by Mr. Tomohiro Tanogami on January 20, 2022

Tomohiro Tanogami from Kyoto University gave a talk titled "A simple XY model for cascade transfer." Cascade transfer is a ubiquitous phenomenon that appears in various physical systems. During a cascade transfer an inviscid conserved quantity such as energy is transferred conservatively from large/small to small/large scales, which results in a universal scaling law in the spectrum (e.g., Kolmogorov energy spectrum). In the talk, Tomohiro proposed a simple XY model which shows inverse energy cascade with a non-Kolmogorov energy spectrum and pointed out that the model may characterize a novel "universality class" of cascade transfer. Tomohiro also explained possible relations between his model and, e.g., spin and atmospheric turbulences. About 20 physicists have joined the seminar and enjoyed discussions from various viewpoints. Reported by Hidetoshi Taya

2022-01-24

Press Release

Origin of Diverse Response Patterns in Signal Transduction - Determining Response Properties by Integrating Experiment and Theory

The ERBB family of receptors, consisting of ERBB1, ERBB2, ERBB3, and ERBB4, is a group of receptors that receive external signaling molecules. When the ERBB receptors receive signaling molecules, they bind to one another and induce phosphorylation reactions, leading to macroscopic responses such as cell proliferation and differentiation. However, it is difficult to measure the details of the binding and phosphorylation reactions of the ERBBs, and it has not been known how the various responses to signals are produced. In this study, we conducted experimental measurements using cells with various compositions of ERBBs and multiple signaling molecules and constructed a mathematical model, which incorporates all possible reactions of ERBBs. By applying the mathematical model, we succeed in explaining and predicting the experimental results on phosphorylation responses. Furthermore, we identified the reactions that play an essential role in the diversity of the phosphorylation responses. Our findings may allow us to control cell responses such as proliferation and differentiation in the future. For more details, please see the press release article from Kyoto University at RELATED LINKS.