Featured News
Interdisciplinary Theoretical and Mathematical Sciences Program (iTHEMS) is an international research program at RIKEN. It facilitates close collaborations among researchers from different disciplines in theoretical, mathematical and computational sciences. The ultimate goal of iTHEMS is to unravel the mystery of the Universe, matter, and life, as well as to solve key problems in modern society through interdisciplinary approaches.
Upcoming Events
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Workshop In Session
Condensed Matter Physics of QCD 2024
March 11 (Mon) - 22 (Fri), 2024
Gordon Baym (Professor Emeritus, University of Illinois, USA)
Muneto Nitta (Professor, Keio University)
Mark Alford (Professor, Washington University in St. Louis, USA)
Sanjay Reddy (Professor, University of Washington, USA)
Dam Thanh Son (Professor, The University of Chicago, USA)
Mikhail Stephanov (Professor, The University of Illinois at Chicago (UIC), USA)
Kenji Fukushima (Professor, Department of Physics, Graduate School of Science, The University of Tokyo)
Naoki Yamamoto (Associate Professor, Keio University)
Koutarou Kyutoku (Associate Professor, Graduate School of Science, Kyoto University)
Yui Hayashi (Postdoctoral researcher, Yukawa Institute for Theoretical Physics, Kyoto University)
Kentaro Nishimura (Postdoctoral researcher, Hiroshima University)
Toru Kojo (Associate professor, Tohoku University)
Masakiyo Kitazawa (Lecturer, Yukawa Institute for Theoretical Physics, Kyoto University) -
Seminar
Multimessenger probes of superheavy dark matter decay and annihilation
March 26 (Tue) at 10:18 - 11:00, 2024
Saikat Das (Postdoctoral Fellows, Yukawa Institute for Theoretical Physics, Kyoto University)
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Seminar
Arrhythmic activity rhythms in ants
March 26 (Tue) at 16:00 - 17:00, 2024
Haruna Fujioka (Assistant Professor, Faculty of Environmental, Life, Natural Science and Technology, Okayama University)
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Special Lecture
Kyoto University SACRA-RIKEN iTHEMS Special Lecture by Prof. Tadashi Tokieda
March 28 (Thu) at 13:30 - 16:30, 2024
Tadashi Tokieda (Professor, Department of Mathematics, Stanford University, USA)
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Special Lecture
TadaFest 2024: Toward understanding of the Origin of Spacetime
April 2 (Tue) at 14:00 - 18:00, 2024
Tsukasa Tada (Coordinator, iTHEMS / Vice Chief Scientist, iTHEMS)
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Colloquium
The 25th MACS Colloquium
April 19 (Fri) at 14:45 - 18:30, 2024
Wataru Morita (Researcher, Department of Anthropology, National Museum of Nature and Science / Associate Professor, Department of Biological Sciences, Graduate School of Science, The University of Tokyo)
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Workshop
Recent Developments and Challenges in Topological Phases
June 3 (Mon) - 14 (Fri), 2024
Opportunities
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Seeking a few Research Scientists or Senior Research Scientists (W23336)
Deadline: Open until filled
Research Scientist or Senior Research Scientist, a few positions. iTHEMS is seeking research scientist(s) or senior research scientist(s) in mathematical sciences including pure mathematics, applied and industrial mathematics.
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Call for applications for the position of Special Postdoctoral Researcher (SPDR) for FY 2025
Deadline: April 9, 2024
RIKEN is currently accepting applications for the FY 2025 Special Postdoctoral Researcher (SPDR) Program, from young, creative, independent researchers who will be a powerful force in furthering RIKEN’s research activities.
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Seeking Research Scientists or Senior Research Scientists (W23178)
Deadline: Open until filled
Research Scientist or Senior Research Scientist, a few positions. iTHEMS is seeking research scientist(s) or senior research scientist(s) as part of its "Mathematical Sciences and Medicine" initiative.
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Seeking Postdoctoral Researcher, Research Scientist and Senior Research Scientist (W23143)
Deadline: Open until filled
Postdoctoral Researcher, Research Scientist or Senior Research Scientist, about 10 positions. This call is open to researchers in any field who wish to participate in RIKEN Quantum.
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Seeking a few Postdoctoral Researchers (RIKEN-Berkeley Fellow associated with N3AS) (W22284)
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, lattice QCD simulations and related fields. Successful applicants will work and spend the first three months at the RIKEN Wako campus, and the remainder of the years at the RIKEN Berkeley Center at the University of California, Berkeley on a long term business trip. The appointments of the RIKEN Berkeley Fellow are made through RIKEN iTHEMS.
Latest News
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2024-03-14
Paper of the WeekWeek 3, March 2024
Title: Absence of ground states for anions Author: Yukimi Goto arXiv: http://arxiv.org/abs/2403.07642v1 Title: Firewalls at exponentially late times Author: Andreas Blommaert, Chang-Han Chen, Yasunori Nomura arXiv: http://arxiv.org/abs/2403.07049v1
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2024-03-13
Seminar ReportDMWG Seminar by Thanaporn Sichanugrist on January 22, 2024
In these years, the study of quantum techniques has been growing so rapidly. New ideas for quantum calculations are being developed, and even the quantum computer will be available in the near future. New quantum tools can be the key to access the physics we have not ever seen. One example is the application of the two-level qubit to searches of dark matter (DM) of dark photons. When a dark photon enters the qubit system, it behaves as an effective electric field and then excites the qubit. Direct measurements of the excitation of a qubit are already achieved. However, in order to claim the significance, we have to achieve a high signal-to-noise ratio which is, in the simplest setup, proportional to the number of the excited qubits. The gain can be improved by introducing another quantum nature to such an experiment. By constructing the quantum circuit combining single systems, the signal-to-noise ratio proportional to the square of the number of the excited qubits is obtained. Behind this magic, coherent accumulations of the phase are achieved due to the entanglement effect. Thanks to this enhancement, the sensitivity to dark photon DM can be improved by about two orders of magnitude compared to the case without a circuit. Further exciting news we have is that such equipment is coming to the real world. Superconducting qubit is realized as an ultra-cold non-linear LC circuit, the readout system is developed using a cavity. The coherence time is important for achieving good readout and it is now rapidly improving. All the system has already been assembled at the University of Tokyo, meaning that it is ready to operate. The characterization of the system is now ongoing and discussion of further improvements and enhancement starts. We should see fantastic results in the near future! Reported by Nagisa Hiroshima
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2024-03-13
Hot TopicFarewell message from Hidetoshi Taya
Our colleague Hidetoshi Taya will move to Department of Physics, Hiyoshi Campus, Keio University as an Assistant Professor, starting from April 1, 2024. We all will miss him and wish him success in his new affiliation! Here is a message from Hidetoshi Taya: It was truly one of the greatest experiences in my whole life to be able to enjoy science at iTHEMS for four years (including the one year in 2017 as a JSPS posdoc, before joining as an SPDR from 2021). All iTHEMS researchers are so talented and have a broad interest in science, covering almost all topics of science, not only physics, but also mathematics, biology, computational science, etc. The scientific discussions in iTHEMS, therefore, have always been extremely interesting and useful. iTHEMS also gave me a unique opportunity to enhance collaborations through the Working/Study Group program, which I used with NEW (Non-Equilibrium Working Group) and the Theoretical Physics Study Group, and I have learned and enjoyed a lot through their activities. I would like to take this opportunity to express my deep gratitude to the director, Hatsuda-san, the deputy directors, and the assistants, who did/do/are making enormous efforts to achieve the great environment of iTHEMS. Finally, I sincerely hope that iTHEMS will continue to develop and expand its presence, and I look forward to continuing to collaborate and enjoy science with iTHEMS researchers. Thanks for the great four years!
Upcoming Visitors
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Tomorrow
Dongsheng Ge
Project Researcher, Department of physics, Osaka UniversityTerm: March 20 (Wed) - 23 (Sat), 2024Visiting Place: RIKEN Wako Campus -
Tomorrow
Hiromi Ebisu
Postdoctoral Fellows, Kyoto UniversityTerm: March 20 (Wed) - 23 (Sat), 2024Visiting Place: RIKEN Wako Campus