ワークショップ

International Workshop on Quantum Geometry

2026年2月3日(火) - 6日(金)

In recent years, quantum geometry has attracted a renewed interest as an important concept in physics, and is being actively studied in a wide variety of fields ranging from condensed matter physics to high-energy physics. This international workshop aims to invite researchers actively working at the forefront of quantum geometry research and hold intensive discussions, thereby providing an opportunity to facilitate mutual interaction that will lead to future collaborations. The workshop will cover a wide range of topics related to quantum geometry, as in condensed matter physics, AMO physics, quantum gravity, quantum information, etc.

会場: 情報基盤棟1階112 (C43) (メイン会場) / Satellite : 4F, "Common Space" of FQSP, Information Science Bldg.(C43)

イベント公式言語: 英語

iTHEMS Cosmology Forum n°5 - Effective Field Theory approaches across the Universe

2026年1月29日(木) 10:00 - 17:00

青木 勝輝 (京都大学 基礎物理学研究所 基研特任助教)
野海 俊文 (東京大学 大学院総合文化研究科 准教授)
Lucas Pinol (CNRS Researcher, Laboratoire de Physique de l’École Normale Supérieure (LPENS), CNRS/École Normale Supérieure, France)

This fifth workshop will bring together researchers exploring the effective field theory (EFT) framework in diverse cosmological contexts. Topics will include EFT formulations of interacting dark matter and dark energy, open EFTs for gravity, and multi-field inflationary dynamics. By highlighting recent progress and open questions, the workshop seeks to bridge insights from the early and late universe through the unifying language of EFT. In addition to the invited talks, the workshop will feature a panel discussion designed to promote interaction between the speakers and participants. One of the key goals of this event is to foster collaboration among researchers working in neighboring fields, and to encourage participation from young and early-career researchers who are interested in, but may not yet have worked on, these themes. The workshop welcomes a broad audience with an interest in theoretical cosmology, gravitation, and quantum field theory. The workshops are organised by the Cosmology Study Group at RIKEN iTHEMS.

会場: 大河内記念ホール

イベント公式言語: 英語

数理科学のアウトリーチについての研究会 2025

2025年11月14日(金) - 16日(日)

今年の「数理科学のアウトリーチについての研究会」を、令和４年度ー８年度　文部科学省・科研費・学術変革領域 (A)「データ記述科学の創出と諸分野への横断的展開」のご援助のもとで、11月14日（金）12:30 ～16日（日）15:00 に「データ記述科学と数理科学のアウトリーチについての研究会」として、九州大学マス・フォア・インダストリ研究所で、対面とズームを併用して開催いたします。RIKEN iTHEMS（SUURI-COOL Kyushu）はこれを共催しています。

会場: 九州大学 伊都キャンパス IMI オーディトリアム W1-D-413 (メイン会場) / via Zoom

イベント公式言語: 日本語

RIKEN–Berkeley Workshop on Quantum Gravity 2025

2025年10月23日(木) - 24日(金)

This workshop will serve as the first meeting of the collaboration between the Leinweber Institute for Theoretical Physics (LITP) at the University of California Berkeley and the RIKEN Center for Interdisciplinary Theoretical and Mathematical Sciences (iTHEMS). Participation is open and researchers from other institutions are welcome to attend. The workshop will feature talks on recent developments in the field of Quantum Gravity and other relevant topics.

会場: via Zoom / 研究本館 3階 359号室 (23日午前) & 4階 435-437号室 (23日午後・24日)

イベント公式言語: 英語

Japan-UK Workshop on Quantum Gravity

2025年9月22日(月) - 26日(金)

The universe at extremely early times is expected to be described by some theory of quantum gravity, although we still do not know precisely what quantum gravity actually is. In modern approaches to quantum gravity, the path integral point of view provides a fundamental framework towards answering this pressing question. However, an evaluation or even just a precise definition of the path-integral for a full-fledged quantum gravity is one of the most important open problems in modern theoretical physics.

会場: 融合連携イノベーション推進棟（IIB） 8階

イベント公式言語: 英語

Functional Renormalization Group at RIKEN 2025

2025年8月25日(月) - 26日(火)

Functional Renormalization Group (FRG) is a powerful theoretical framework for investigating physical systems described by field theory. Its applications span a wide range of areas, from condensed matter and statistical physics to particle physics and gravity. This two-day workshop aims to provide an overview of recent applications and developments of FRG across various fields, foster discussions on future directions, and explore opportunities for new collaborations.

会場: 理化学研究所 和光キャンパス 研究本館3階 345-347

イベント公式言語: 英語

iTHEMS-NCTS Workshop

2025年8月18日(月) - 21日(木)

This workshop aims to strengthen collaboration between researchers at RIKEN iTHEMS and the National Center for Theoretical Sciences in Taiwan. It will be a four-day event, with the first two days dedicated to interdisciplinary topics. The last two days will focus on specialized areas, with one day devoted to condensed matter physics and the other to high-energy physics, including quantum gravity.

会場: via Zoom / 理化学研究所 和光キャンパス

イベント公式言語: 英語

Crossroads of Virology and Mathematical Sciences

2025年8月8日(金) 9:30 - 17:30

竹田 誠 (東京大学 大学院医学系研究科 教授)
山次 康幸 (東京大学 農学生命科学研究科 教授)
氣駕 恒太郎 (国立健康危機管理研究機構 室長)
藤田 大士 (京都大学 高等研究院 (KUIAS) 准教授)
小磯 深幸 (九州大学 名誉教授)
黒田 大祐 (日本大学 文理学部 生命科学科 准教授)
カトゥリン・ボシゥメン (理化学研究所 数理創造研究センター (iTHEMS) 副センター長)
谷川 眞一 (東京大学 大学院情報理工学系研究科 准教授)
橋口 隆生 (京都大学 医生物学研究所 教授)
福原 秀雄 (北海道大学 人獣共通感染症国際共同研究所 准教授)
小嶋 将平 (理化学研究所 生命医科学研究センター (IMS) ゲノム免疫生物学理研白眉研究チーム 基礎科学特別研究員)
宮下 脩平 (東北大学 大学院農学研究科 助教)
富安 亮子 (九州大学 マス・フォア・インダストリ研究所 教授)
鈴木 雄太 (国立研究開発法人科学技術振興機構 (JST) 専任研究者)
Adnan Sljoka (理化学研究所 革新知能統合研究センター (AIP))

午前セッション①（ウイルス） 10:00–10:20 麻疹ウイルス工学 竹田 誠（東大 医学系研究科） 10:20–10:40 ポテックスウイルスに対する植物免疫機構 山次 康幸（東大 農学生命科学研究科） 10:40–11:00 ファージの巧妙な感染戦略と細菌の防御応答 氣駕 恒太郎（感染研） 休憩（11:00–11:15） 午前セッション②（分子・数理） 11:15–11:35 多面体型の分子自己集合体を自在に設計する 藤田大士（京大 高等研究院） 11:35–11:55 Anisotropic energy and (curved) polyhedron 小磯 深幸（九大） 11:55–12:15 自然界に倣う二成分タンパク質集合体のデザイン：細胞骨格様構造からウイルス様構造へ 鈴木 雄太（JSTさきがけ） 昼休憩（12:15–13:20） 午後セッション①（計算・数理） 13:20–13:40 Computer-aided antibody design 黒田 大祐（日本大学 生命科学科） 13:40–14:00 Revealing Protein Allostery and Functional Dynamics via Rigidity Theory and NMR Adnan Sljoka（理研 革新知能統合研究センター） 14:00–14:20 Using mathematical models to identify experimental pitfalls when probing virus replication in vitro Catherine Beauchemin（理研 iTHEMS） 14:20–14:40 Combinatorics behind statics and flexibility of graphs 谷川 眞一（東大 情報理工） 休憩（14:40–14:55） 午後セッション②（構造） 14:55–15:15 Glycoprotein structures in human pathogenic RNA viruses 橋口 隆生（京大 医生物） 15:15–15:35 北海道大学におけるクライオ電子顕微鏡設備の紹介 福原 秀雄（北大 人獣共通感染症研） 休憩（15:35–15:50） 午後セッション③（ウイルス・数理） 15:50–16:10 ウイルス感染時の宿主応答のヒト集団遺伝学 小嶋 将平（慶應大 Bio2Q） 16:10–16:30 陸上植物の自殺型抗ウイルス集団抵抗性 宮下 脩平（東北大 農学研究科） 16:30–16:50 Mathematical and crystallographic perspectives in virology 富安 亮子（九大 IMI） 組織委員: Catherine Beauchemin（理研 iTHEMS） 竹田 誠（東大 医学系研究科） 富安 亮子（九大 IMI）

会場: 研究本館 3階 359号室 (メイン会場) / via Zoom

iTHEMS Cosmology Forum #4 - Evolving Cosmos: new physical insights from new spectroscopic data

2025年8月4日(月) - 5日(火)

Seshadri Nadathur (Associate Professor, University of Portsmouth, UK)
Andrei Cuceu (NASA Einstein Fellow, Lawrence Berkeley National Laboratory (LBNL), USA)
Gerrit Farren (Postdoc, Lawrence Berkeley National Laboratory (LBNL), USA)
Antonio De Felice (京都大学 基礎物理学研究所 准教授)
Linda Blot (東京大学 カブリ数物連携宇宙研究機構 (Kavli IPMU) 特任助教)
殷 文 (東京都立大学 大学院理学研究科 物理学専攻 准教授)

iTHEMS Cosmology Forum Workshop is a series of short workshops, each focusing on an emerging topics in cosmology. The target audience is cosmologists, high-energy physicists and astronomers interested in learning about the subject, not just those who have already worked on the topic. The goal of the workshop is to provide working knowledge of the topic and leave dedicated time for discussions to encourage mutual interactions among participants. The fourth workshop is dedicated to new physics discoveries enabled by new spectroscopic data. Nearly three decades after the discovery of accelerated expansion, there is at last compelling data pointing away from the simple cosmological constant. The results of new data hint at evolving dark energy, but the statistical significance and physical interpretation are both far from clear. Furthermore, another anticipated new physics measurement of the neutrino mass has also proven difficult. With this workshop, we aim to interrogate both the statistical evidence for new physics as well as the theoretical implications if these new results are confirmed. This forum will consist of two days. The workshop will be in English. The workshops are organised by the iTHEMS Cosmology Forum working group, which is the successor of the Dark Matter Working Group at RIKEN iTHEMS. Important dates: July 18 - Registration deadline August 4th, 5th - Workshop Days Invited Speakers: Sesh Nadathur (University of Portsmouth) Andrei Cuceu (LBNL) Gerrit Farren (LBNL) Antonio De Felice (YITP) Linda Blot (IPMU) Wen Yin (TMU)

会場: 研究本館 4階 435-437号室

イベント公式言語: 英語

The Theory of Periodic Tangles & Their Interdisciplinary Applications

2025年7月28日(月) - 8月1日(金)

The mathematical characterization of entanglement holds immense potential for describing the mechanical functions of diverse physical systems and materials. A universal interdisciplinary study, involving scientists, engineers, and artists promises both advance of the field itself and significant contribution to the research and design of innovative solutions for textiles, medical devices, polymers, molecular chemistry, or construction materials among others. The program seeks an alternative to the trial–and–error approach, bringing together academia and industry to seek new sustainable solutions and inspiration, contributing to society. It will consist not only of scientific exchanges but will promote cultural impact by organizing exhibitions or hands–on workshops. Additionally, it will encourage several discussions by providing networking opportunities and utilizing the unique venue of House of Creativity at Tohoku University. This workshop will gather researchers from various disciplines and include invited lectures, a poster session, roundtable discussions, and brainstorming activities. Our focus will be on exploring the connections between knot theory and its applications in areas such as polymers and soft matter, textile mechanics, graphic design, and more. This event includes a joint symposium between the WPI–AIMR (Tohoku University) and WPI–SKCM2 (Hiroshima University) on Friday, August 1st, 2025: INTERWOVEN: A WPI–AIMR & WPI–SKCM2 Symposium, Towards a Universal Topological Model of Entangled Structures for Sustainable Metamaterials Please fill in the registration form by June 16th 2025. Confirmed speakers (alphabetical order): Jörn Dunkel (Massachusetts Institute of Technology) Yuanyuan Guo (Tohoku University) Tatsuki Hayama (Keio University) Louis H. Kauffman (University of Illinois at Chicago) Yuka Kotorii (Hiroshima University) Sofia Lambropoulou (National Technical University of Athens) Eleni Panagiotou (Arizona State University) Pedro M. Reis (École Polytechnique Fédérale de Lausanne) Takahiro Sakaue (Aoyama Gakuin University) Vanessa Sanchez (Rice University) Henry Segerman (Oklahoma State University) Koya Shimokawa (Ochanomizu University) Hiroshi Suito (Tohoku University) Ryuichi Tarumi (Osaka University) Hirofumi Wada (Ritsumeikan University) Please refer to the workshop website via the relevant link for more details. We are looking forward to your participation and to welcoming you to Sendai!

会場: 東北大学片平キャンパス 知の館

イベント公式言語: 英語

Recent Developments and Challenges in Tensor Networks: Algorithms, Applications to science, and Rigorous theories

2025年7月28日(月) - 8月8日(金)

会場: 京都大学 基礎物理学研究所 湯川記念館 パナソニック国際交流ホール

イベント公式言語: 英語

iTHEMS-TheoryCenter(KEK) Scientific Writing and DEI Workshop

2025年6月24日(火) - 25日(水)

Ashleigh Griffin (Professor, Department of Biology, University of Oxford, UK)
Stuart West (Professor, Department of Biology, University of Oxford, UK)
入谷 亮介 (理化学研究所 数理創造研究センター (iTHEMS) 数理基礎部門 上級研究員)

This is a two-day KEK-iTHEMS workshop on scientific writing and diversity, equity, and inclusion. For more details, please visit the workshop website via the relevant link.

会場: 理化学研究所和光キャンパス 本部棟2階大会議室

イベント公式言語: 英語

Mini-Workshop on Neuro Science

2025年5月16日(金) 9:00 - 12:00

磯 暁 (理化学研究所 数理創造研究センター (iTHEMS) センター長)
磯村 拓哉 (理化学研究所 脳神経科学研究センター (CBS) 脳型知能理論研究ユニット ユニットリーダー)
豊泉 太郎 (理化学研究所 脳神経科学研究センター (CBS) 数理脳科学研究チーム チームディレクター)
岡ノ谷 一夫 (帝京大学 先端総合研究機構 教授)
入來 篤史 (帝京大学 先端総合研究機構 特任教授)
Gary Shiu (Professor, Department of Physics, University of Wisconsin-Madison, USA)

[Program] 9:00am – 9:05am Satoshi Iso (iTHEMS RIKEN) “Opening Remarks” 9:05am – 9:35am Takuya Isomura (CBS RIKEN) “Triple equivalence integrates neural network dynamics, statistical inference, and computation” 9:45m – 10:15am Taro Toyoizumi (CBS RIKEN) “Chaotic neural dynamics facilitate probabilistic computations through sampling” 10:25am – 10:55am Kazuo Okanoya (Teikyo University) “Brain topography and auditory processing in birds and rats” 11:05am – 11:30am Atsushi Iriki (Teikyo University, iTHEMS RIKEN) “From Classical to Quantum: Rethinking Science, Consciousness, and Civilization” 11:30am – Gary Shiu (University of Wisconsin) “Summary: Mathematical Science and Brain” Followed by a seminar 2:00pm – 3:30pm Prof. Gary Shiu (University of Wisconsin) Topology and Brain Science Room 359, 3rd floor, Main Research Building, RIKEN

会場: 理化学研究所 和光キャンパス 研究本館3階 345-347 (メイン会場) / via Zoom

イベント公式言語: 英語

From Quarks to Neutron Stars: Insights from kHz gravitational waves

2025年4月23日(水) - 24日(木)

Astronomical observations of binary neutron star mergers and supernovae provide unique opportunities to explore physics spanning from quarks to neutron stars. The groundbreaking multi-messenger observation of GW170817, combining electromagnetic signals and gravitational waves, vividly demonstrated this potential. Furthermore, if a core-collapse supernova were to occur in our galaxy, it would likely become the first event where electromagnetic signals, neutrinos, and gravitational waves are detected together. The interior of neutron stars is not yet well understood due to their extreme density, where exotic states of matter may emerge. Gravitational waves, particularly in the kilohertz band, play a crucial role in extracting information about such ultra-high densities. In recent years, several concepts for kilohertz-band gravitational wave detectors, such as Australia's NEMO, have been proposed to advance multi-messenger studies of high density astrophysical objects. KAGRA in Japan is also exploring upgrades aimed at enhancing high-frequency sensitivity, which could significantly improve sky localization accuracy and enable the detection of post-merger signals. This workshop aims to explore the transformative potential of high-frequency gravitational wave observations for multi-messenger astrophysics, with a focus on their implications for nuclear and neutron star physics. The workshop aims to spark dynamic discussions and cultivate new collaborations among participants through invited talks by leading experts and engaging poster presentations.

会場: via Zoom

イベント公式言語: 英語

Third Workshop on Density Functional Theory: Fundamentals, Developments, and Applications (DFT2025)

2025年3月25日(火) - 27日(木)

The density functional theory (DFT) is one of the powerful methods to solve quantum many-body problems, which, in principle, gives the exact energy and density of the ground state. The accuracy of DFT is, in practice, determined by the accuracy of an energy density functional (EDF) since the exact EDF is still unknown. Currently, DFT has been used in many communities, including nuclear physics, quantum chemistry, and condensed matter physics, while the fundamental study of DFT, such as the first principle derivations of an accurate EDF and methods to calculate many observables from obtained densities and excited states, is still ongoing. However, there has been little opportunity to have interdisciplinary communication. On December 2022, we had the first workshop on this series (DFT2022) at Yukawa Institute for Theoretical Physics, Kyoto University, and several interdisciplinary discussions and collaborations were started. On February 2024, we had the second workshop on this series (DFT2024) at RIKEN Kobe Campus, and more stimulated discussion occured. To keep and extend collaborations, we organize the third workshop. Since the third workshop, we extend the scope of the workshop to the development and application of DFT as well. In this workshop, the current status and issues of each discipline will be shared towards solving these problems by meeting together among researchers in mathematics, nuclear physics, quantum chemistry, and condensed matter physics. This workshop mainly comprises lectures/seminars on cutting-edge topics and discussion, while sessions composed of contributed talks are also planned.

会場: 融合連携イノベーション推進棟（IIB） 8階 / via Zoom

イベント公式言語: 英語