Featured News
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iTHEMS Science Outreach Workshop 2022 was held on July 29-31, 2022
On July 29-31, we had Meeting on Outreach of RIKEN iTHEMS 2022 @Kobe & Zoom. This year the meeting was hosted by Suuri Cool Kobe and the venue was the auditorium (8F) + the cafeteria (6F) of Kobe Integrated Innovation Building (IIB). This meeting was hit by the big growth of infected population by Covid-19 omicron BA.5. However, under careful preparation and precaution taken, 27 people participated at Kobe IIB and 24 more by zoom. There were 11 talks at the venue and 6 talks by zoom. 4 talks were by members of iTHEMS explaining recent development in various fields in sciences. 3 talkes were from universities on different aspects of research or fostering young researchers. 10 talks were given by journalists. There were also 3 posters (2 on research and 1 on a monthly academic magazine), in addition, the Black Hole Reacorder was exhibited at the cafeteria. The participants consist of 9+10 members from RIKEN, 6+4 from universities and 12+10 journalists (at venue + by zoom). By the success of this meeting, we hope the continuation of Journalist in residence program and this workshop next year.
2022-08-08
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iTHEMS and RIKEN-Berkeley Center is featured in RIKEN at a Glance 2022
RIKEN's pamphlet "RIKEN at a Glance 2022" features iTHEMS and the newly opened RIKEN-Berkeley Center. Please see the related link for details.
2022-07-26
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RIKEN Research: Flitting between the wings of a butterfly
Just making small tweaks to certain variables could potentially modify extreme weather events such as sudden downpours, computer simula- tions by two RIKEN researchers have shown. Scientists have long desired to develop ways to control the weather. Research in this area has intensified due to climate change, which is giving rise to more extreme weather events. Present methods for modifying the weather have limited success. Seeding the atmosphere can induce rain, but only when the atmosphere is already in a state where it might rain. Geoen- gineering projects have been envisioned, but they have yet to be conducted due to concerns about unpredicted long-term effects. As a promising approach, Takemasa Miyoshi and Qiwen Sun, both of the RIKEN Center for Computational Science, have looked to chaos theory to assess the possibility of mitigating weather events such as torrential rain by making small changes. Instead of con- sidering the weather system in all its complexity, they focused on a far simpler system—the butterfly attractor. To read more, please see related links.
2022-06-28
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RIKEN Research: Worming out of the black-hole information paradox
RIKEN physicist and two colleagues have found that a wormhole—a theoretical bridge connecting distant regions of the Universe—may help to shed light on the mystery of what happens to information about matter consumed by black holes. Einstein’s theory of general relativity predicts that nothing that falls into a black hole can escape its clutches. But in the 1970s, Stephen Hawking calculated that black holes should emit radiation when quantum mechanics, the theory governing the microscopic realm, is considered. “This is called black hole evaporation because the black hole shrinks, just like an evaporating water droplet,” explains Kanato Goto of the RIKEN Interdisciplinary Theoretical and Mathematical Sciences. To read more, please see related links.
2022-06-28
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RIKEN-Berkeley Center was opened
RIKEN iTHEMS and N3AS Physics Frontier Center have started a joint research center, RIKEN-Berkeley Center (RBC), physically located on the 3rd floor of the physics building in Univ. California, Berkeley. This new Center aims to enhance the collaboration on nuclear astrophysics and quantum information science between the two institutions. On May 27-29, 2022, the first annual meeting of N3AS was held in Berkeley together with their international partners, RIKEN iTHEMS and CNRS Centre Pierre Binetruy. iTHEMS members are encouraged to use RBC as a base to interact with researchers in physics, mathematics, biology and related fields at Berkeley.
2022-06-09
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Ryosuke Iritani was interviewed by The Big Issue of Japan
Ryosuke Iritani (Research Scientist, iTHEMS) is interviewed by The Big Issue Japan, and the latest volume (vol 432) is just published on 1st June. The Big Issue is a magazine dedicated to supporting people in difficult circumstances and helping them achieve self-reliance. Each issue costs 450 yen, out of which 230 yen is the direct income of the street sales staff. The content is about mathematical biology and is accessible for anyone. We hope as many people as possible take it a read and support the people!
2022-06-06
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進化・生態ダイナミクスの共通法則 －生物の個体群変化を物理学的な関係式で記述する－
理化学研究所（理研）生命機能科学研究センター生体非平衡物理学理研白眉研究チームの足立景亮基礎科学特別研究員（数理創造プログラム基礎科学特別研究員）、理研数理創造プログラムの入谷亮介研究員、濱崎立資上級研究員（開拓研究本部濱崎非平衡量子統計力学理研白眉研究チーム理研白眉研究チームリーダー）の研究チームは、情報理論・統計物理学の手法を用いることで、進化・生態系の個体群ダイナミクスを扱う理論モデルにおいて幅広く成り立つ関係式を提案しました。 本研究成果は、進化や生態系における複雑な個体数の時間的変化を統一的枠組みによって理解することにつながると期待できます。 詳細は関連リンクをご覧ください。
2022-06-06
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巨視的な遷移における速度限界の発見 －連続の式に基づく統一的アプローチ－
理化学研究所（理研）開拓研究本部非平衡統計力学理研白眉研究チームの濱崎立資理研白眉研究チームリーダー（数理創造プログラム上級研究員）は、「巨視的な遷移」を伴うような物理的過程において有用となる「速度限界」、すなわち遷移速度に関する不等式を新たに発見しました。 本研究成果は、量子多体系の熱平衡化の時間スケールなどをはじめとする非平衡統計力学へ示唆を与えると同時に、巨視的な量子系の制御など、近年重要となっている量子技術の基礎的な理解に貢献することが期待できます。 続きは関連リンクをご覧ください。
2022-05-09
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トンガ海底火山噴火のラム波を鮮明に可視化 －ひまわり8号が捉えた波の全貌－
理化学研究所（理研）計算科学研究センターデータ同化研究チームの三好建正チームリーダー（開拓研究本部三好予測科学研究室主任研究員、数理創造プログラム副プログラムディレクター）、大塚成徳研究員（開拓研究本部三好予測科学研究室研究員、数理創造プログラム研究員）の研究チームは、気象衛星ひまわり8号の画像を用いて、2022年1月に発生したトンガの海底火山噴火に伴う音波の一種である「ラム波」を鮮明に可視化する手法を独自に開発しました。さらに、この画像からラム波を自動抽出する手法を開発し、到達時刻分布や地上気圧観測との関係を明らかにしました。 本研究成果は、火山噴火などに伴う大気波動やそれに伴う潮位変動の科学的理解と実況監視、観測データと大気・海洋の大規模計算との融合によるシミュレーションの高度化や将来的な予測手法の開発に貢献すると期待できます。 続きは関連リンクをご覧ください。
2022-05-09
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RIKEN Research: Quantum computing and deep learning could help solve the mysteries of quantum gravity
RIKEN physicists have put quantum computing and deep learning through their paces and found that they are powerful tools for gleaning insights into new theories of quantum gravity [1]. They could thus help solve one of the most formidable challenges in modern physics—developing a theory of gravity that jives with quantum physics. When Einstein nutted out his theory of general relativity in 1915, his only tools were pen and paper. The same was true of the pioneers of quantum theory. But the next major breakthrough in theoretical physics could be made with help from emerging technologies such as quantum computers and machine learning, Enrico Rinaldi of RIKEN Theoretical Quantum Physics Laboratory thinks. “I believe these technologies are poised to transform the way we do theoretical physics,” he says. To read more, please visit the related link.
2022-04-25
Videos
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Odd couples of interdisciplinary research
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役に立たない科学は、未来を変えるのか。〜最新理論から空想した大容量情報ストレージ“ブラックホール蓄音機“とは？
理化学研究所 2019
Comparison between conventional computers and quantum computers
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Building something from nothing: a mathematical framework for aperiodic/amorphous sets
数理創造プログラム（Interdisciplinary Theoretical and Mathematical Sciences Program, 略称 iTHEMS アイテムズ）は、理論科学・数学・計算科学の研究者が分野の枠を越えて基礎研究を推進する、理化学研究所の新しい国際研究拠点です。iTHEMSでは、「数理」を軸とする分野横断的手法により、宇宙・物質・生命の解明や、社会における基本問題の解決を目指しています。
Upcoming Events
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セミナー
EHT-SgrA*(TBD)
2022年8月26日(金)14:00 - 15:00
水野 陽介 (Tsung-Dao Lee Institute, Shanghai Jiao Tong University, China)
会場: via Zoom
イベント公式言語: 英語
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セミナー
Study of the eta' meson in nuclei in the LEPS2/BGOegg experiment
2022年8月26日(金)16:30 - 18:00
冨田 夏希 (京都大学 大学院理学研究科 附属サイエンス連携探索センター (SACRA) 特定助教)
A large mass reduction of eta'(958) meson in nuclear medium owing to its UA(1) anomaly is expected in several model calculations. We carried out the LEPS2/BGOegg experiment at SPring-8 to study eta' meson properties in nuclei. If there is a large mass reduction in nuclei, an eta' meson and a nucleus may form a bound state. We searched for the eta'-nucleus bound states via missing mass spectroscopy of the 12C(gamma, p) reaction. To suppress background events from multi-meson production, we simultaneously measured decay products from the eta'-nucleus system for the first time. We also carried out the missing mass spectroscopy simultaneously detecting an eta' meson escaping from a nucleus for the first time. We will show the experimental results and comparisons with theoretical calculations. We will also show the preliminary results of the line shape analysis of the invariant mass spectra of the eta'->2gamma decay in the gamma+12C->eta'+X reaction.
会場: 研究本館 (メイン会場) / via Zoom
イベント公式言語: 英語
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ワークショップ
DM3 - Deep insights and Multiple strategies for Deciphering the Mystery of Dark Matter
2022年9月15日(木) - 17日(土)
会場: SUURI-COOL (Kobe) / via Zoom
イベント公式言語: 英語
Opportunities
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研究員又は上級研究員募集 (W21319) *理論生物学、数理生物学、あるいは生物物理学
締め切り: ポストが決まり次第
研究員または上級研究員 若干名。iTHEMSでは、理論生物学、数理生物学、あるいは生物物理学における研究員または上級研究員を募集します。iTHEMSの理念のもと、数理科学におけるトップレベルの研究を行うのみならず、数学、物理学、化学、生物学、情報科学、計算科学、社会科学などの異分野間の学際的共同研究をリードすることが期待されています。今回は、生物物理学の分野で高い能力を持つ若手研究者を募集します。
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研究員又は上級研究員募集 (W21320) *純粋数学、応用数学、情報科学などの数理科学分野
締め切り: ポストが決まり次第
研究員または上級研究員 若干名。iTHEMSでは、純粋数学、応用数学、情報科学などの数理科学分野の研究員または上級研究員を募集します。iTHEMSの理念のもと、数理科学におけるトップレベルの研究を行うのみならず、数学、物理学、化学、生物学、情報科学、計算科学、社会科学などの異分野間の学際的共同研究をリードすることが期待されています。今回は、数理科学の分野で高い能力を持つ若手研究者を募集します。
Latest News
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2022-08-11
今週の論文Week 2, August 2022
Title: Calibration of nuclear charge density distribution by back-propagation neural networks Author: Zu-Xing Yang, Xiao-Hua Fan, Tomoya Naito, Zhong-Ming Niu, Zhi-Pan Li, Haozhao Liang arXiv: http://arxiv.org/abs/2205.15649v2 Title: Stability against three-body clustering in one-dimensional spinless p-wave fermions Author: Yixin Guo, Hiroyuki Tajima arXiv: http://arxiv.org/abs/2208.03654v1 Title: Thermal Ringdown of a Kerr Black Hole: Overtone Excitation, Fermi-Dirac Statistics and Holography Author: Naritaka Oshita arXiv: http://arxiv.org/abs/2208.02923v1 Title: Tricritical phenomena in holographic chiral phase transitions Author: Masataka Matsumoto arXiv: http://arxiv.org/abs/2208.02605v1
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2022-08-08
ホットトピック
iTHEMS Science Outreach Workshop 2022 was held on July 29-31, 2022
On July 29-31, we had Meeting on Outreach of RIKEN iTHEMS 2022 @Kobe & Zoom. This year the meeting was hosted by Suuri Cool Kobe and the venue was the auditorium (8F) + the cafeteria (6F) of Kobe Integrated Innovation Building (IIB). This meeting was hit by the big growth of infected population by Covid-19 omicron BA.5. However, under careful preparation and precaution taken, 27 people participated at Kobe IIB and 24 more by zoom. There were 11 talks at the venue and 6 talks by zoom. 4 talks were by members of iTHEMS explaining recent development in various fields in sciences. 3 talkes were from universities on different aspects of research or fostering young researchers. 10 talks were given by journalists. There were also 3 posters (2 on research and 1 on a monthly academic magazine), in addition, the Black Hole Reacorder was exhibited at the cafeteria. The participants consist of 9+10 members from RIKEN, 6+4 from universities and 12+10 journalists (at venue + by zoom). By the success of this meeting, we hope the continuation of Journalist in residence program and this workshop next year.
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2022-08-08
セミナーレポート
iTHEMS Math Seminar by Prof. Narutaka Ozawa on August 2, 2022
On August 2, Professor Narutaka Ozawa (RIMS, Kyoto University) gave a talk entitled "Product Replacement Algorithm, Semidefinite Programming, and Operator Algebras" in the iTHEMS Math Seminar. He elegantly explained how his recent study on Kazhdan's property (T) ties the field of functional analysis/operator algebras and that of computer sciences. Reported by Michiya Mori