RIKEN Interdisciplinary Theoretical and
Mathematical Sciences Program
理化学研究所 数理創造プログラム

Farewell message from Lucy McNeill

Our colleague Lucy McNeill has moved on to a new career as a Hakubi Assistant Professor at The Hakubi Center for Advanced Research, Kyoto University as of January 16, 2025. We all will miss her and wish her the best of luck in her latest endeavor. Here is a message from Lucy McNeill: <i>During my 1 year at iTHEMS as a postdoctoral researcher, I was presented with opportunities to further both my own research and professional development at every turn. I am especially grateful for iTHEMS directors and colleagues' support in starting the "asymptotics in astrophysics" iTHEMS study group, ample chances to travel abroad to share my work, and the frequent international workshops organised at iTHEMS. In particular, workshops co-hosted with RIKEN-Berkeley left this lasting impression on me; that new stellar astrophysics and supernova physics paradigms are creatively and efficiently conceived when physicists, mathematicians and data scientists join forces to solve longstanding astrophysical puzzles. iTHEMS is such a special place where those necessary first interactions are regularly facilitated, and I am sad to leave. But... "I'll be back"!</i>

2025-01-17

Farewell message from Yantao Wu

Our colleague Yantao Wu will move on to a new career as a faculty member at Institute of Physics, Chinese Academy of Sciences as of January 10, 2025. We all will miss him and wish him the best of luck in his latest endeavor. Here is a message from Yantao Wu: <i>I joined iTHEMS in June 2021 as a RIKEN-Berkeley fellow, and have stayed here for three years and a half now. iTHEMS is a precious rare place in the academic world, where there seems to be no responsibility, no one telling you what to do, and infinite space for travel; where there seems to be a curious mind on every subject and every question ought to be asked. The interdisciplinary nature of the group has forever left an imprint on me, and I will always remember the vivid biological facts and mathematical tricks that I have learned here. Entering as a condensed matter physicist and leaving as a condensed matter physicist, my heart will always have a spot for the particle theory which I have learned from here. It has been an unexpected, yet very pleasant mix. Sadly, it appears that every gathering ends somewhere, and I need to leave this warm and protective bubble to a new place, to really enter the grown world of independent research and start my own group. iTHEMS will always remain as a source of lasting encouragement. I will move to the Institute of Physics, Chinese Academy of Sciences in Beijing to start a faculty position. If you ever want to visit, please let me know you are from iTHEMS and I will make you a cup of tea (amidst taking you to the great wall and covering your travel costs.) </i>

2025-01-10

量子観測に誘起されたスペクトル相転移の発見

理化学研究所（理研）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の濱崎 立資 理研白眉研究チームリーダー（理研 数理創造プログラム 上級研究員）、東京大学 大学院工学系研究科 物理工学専攻の望月 健 助教（理研 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 客員研究員）の共同研究チームは、観測下の量子系におけるスペクトル相転移を発見しました。 本研究成果は、近年急速に研究が進んでいる「非平衡な量子系における観測誘起相転移」と、古くから精力的に研究されている「平衡状態にある量子系における相転移」を、同一の枠組みで統一的に理解することにつながると期待されます。 共同研究チームは、Lyapunov解析という手法を用いることで、観測下の量子系においてもスペクトル相転移が存在することを示しました。また、その臨界点が量子もつれ転移の臨界点と一致することを見いだしました。 詳細は関連リンクをご覧下さい。

2025-01-10

古代DNAが西暦1千年紀の移住に関する新たな理解を解明

理化学研究所（理研）数理創造プログラム（iTHEMS）のシュパイデル 玲雄 理研ECL研究ユニットリーダーらの国際共同研究グループは、古代DNAを用いたより正確な祖先分析法を用いて、紀元後1千年紀にヨーロッパを横断した人類の移動を明らかにしました。本研究成果の新しい方法は、世界中の他の集団に適用することが可能で、パズルの欠けているピースを明らかにすることが期待できます。 詳細は関連リンクよりフランシス・クリック研究所のプレスリリースをご覧下さい。

2025-01-02

iTHEMS Science Outreach Workshop 2024 was held on November 15-17, 2024

On November 15-17, we had Meeting on Outreach of RIKEN iTHEMS 2024 @Sendai & Zoom. This year as the last year the meeting was held at TOKYO ELECTRON House of Creativity 3F, Lecture Theater, Katahira Campus, Tohoku University. It was organized by RIKEN iTHEMS and Mathematical Science Center for Co-creative Society of Tohoku University and co-organised by Tohoku Forum for Creativity, Organization for Research Promotion, Tohoku University and RIKEN CPR, Prediction Science Laboratory. There were 39 people participated at TOKYO ELECTRON House of Creativity and 16 more by zoom. There were 20 talks at the venue and 2 talks by zoom. There were 2 posters, one photo exhibition. There were really a variety of thought around the past and the future of mathematics. Some of highlights are: talks concerning about causality from designers and physisists; about teaching mathematics in Art University; about the preparation of "Mathematics Connecting to the World: One S&T poster for Every Household"; etc. 7 talks were given by journalists and 1 by MEXT. The on-site participants consist of 10+1 members from RIKEN, 14+3 from universities and institutes, and 12+5 journalists (at venue + by zoom). We organized a social gathering on the first evening which was successful. We thank very much for the help of Tohoku University for the warm hospitality. By the success of this meeting, we hope the continuation of Journalist in residence program and this workshop next year. Reported by Takashi Tsuboi

2024-12-24

Hadrons and Hadron Interactions in QCD -- Experiments, Effective theories, and Lattice -- (HHIQCD2024) was held from Oct. 14 to Nov. 15, 2024

On Oct. 14 (Mon) - Nov. 15 (Fri), a long-term workshop "Hadrons and Hadron Interactions in QCD -- Experiments, Effective theories, and Lattice -- (HHIQCD2024)" was held at Yukawa Institute for Theoretical Physics (YITP), Kyoto University. The week of Oct. 28 (Mon) - Nov. 2 (Fri) was held as "Nishinomiya-Yukawa symposium". The workshop was sponsored by YITP and supported by RIKEN-iTHEMS and several JSPS/JST programs. We had 193 participants from all over the world, with most of them attending in-person. There were 64 invited talks and 49 contributed talks. The international school, "Introduction to QCD and related topics", was also held and 5 lectures were given. The purpose of this HHIQCD2024 workshop was to bring researchers in lattice QCD, various effective field theories and also experimentalists together and make extensive discussions on hadron physics. Furthermore, the workshop also focused on formal developments of quantum field theories and frontiers of first-principle calculations (quantum computation and tensor network methods). The workshop expected to bring a new direction of researches to understand the nature of QCD. This long-term workshop was a "stay-and-discuss" style workshop in a relaxed atmosphere, where each participant was encouraged to stay long. With this style, participants had intensive discussions with other participants, and even started new collaborations during the workshop. Presentation slides can be downloaded from the HHIQCD2024 web page.

2024-12-17

量子重力理論の探求と未来への貢献 - 野村 泰紀

カリフォルニア大学バークレー校の教授である理論物理学者の野村 泰紀さんは、昨年から夏季の約2か月間、理研iTHEMSに滞在し、研究活動を行っています。多忙な日々を送りながら、アウトリーチ活動も積極的に取り組んでいる野村さん。これまでの人生の歩みや研究活動への思いなどについてお話を伺いました。 記事全文は関連リンクからご覧ください。

2024-12-04

微生物の研究から広がる新たな医療の可能性 - 熊倉 大騎

熊倉大騎さんは、北海道大学大学院生命科学院の博士課程の学生と並行して、理研iTHEMSに大学院生リサーチ・アソシエイト（Junior Research Associate: JRA）として在籍し、研究を進めています。学生としてiTHEMSで研究する利点や今後の展望などについてお話を伺いました。 記事全文は関連リンクからご覧ください。

2024-12-04

Farewell message from Shingo Gibo

Our colleague Shingo Gibo will move on to a new career as senior researcher at Institute for Basic Science (IBS), South Korea as of December 1, 2024. We all will miss him and wish him the best of luck in his latest endeavor. Here is a message from Shingo Gibo: <i>I joined iTHEMS in September 2018 and spent six years as a postdoctoral researcher at iTHEMS. During this time, I have theoretically studied biological oscillations with Kurosawa-san. Additionally, I collaborated on interdisciplinary research on waveforms in circadian clocks with physicists, Hatsuda-san and Kunihiro-san. I would like to thank all the members for the valuable discussions and support. I have learned a lot and truly enjoyed my time at iTHEMS. From December, I will be moving to Institute for Basic Science (IBS) in South Korea as a senior researcher. Thank you for the great six years and see you again!</i>

2024-11-26

研究者であり続けるために - 辰馬 未沙子

惑星はどのようなプロセスを経て形成されるのだろうか？——その答えを理論的に導き出すことを、辰馬 未沙子 研究員は目指しています。辰馬研究員は自身を「優柔不断なところもありますが、基本的には完璧主義」と評し、「どういう戦略を取ればよいかを考えて動く」と語ります。それは、研究はもちろん、プライベートライフにおいても当てはまります。その戦略とはどのようなものなのでしょうか。 記事全文は関連リンクからご覧ください。

2024-11-18

数学者 坪井俊さんインタビュー【PARTⅠ】

数学者 森脇湧登さんインタビュー【後編】

数学者 森脇湧登さんインタビュー【前編】

数学者 井上瑛二さんインタビュー【後編】

物理学者 野村泰紀さんインタビュー【PARTⅡ】

数理と微生物研究の関係【水産学部から数理の道へ】

「一家に1枚」ポスター制作にも参加【よく理科室に貼ってあるやつ】

惑星形成論 研究者 辰馬未沙子さんインタビュー

数学者 井上瑛二さんインタビュー【前編】

物理学者 野村泰紀さんインタビュー【PARTⅠ】

物理学者 難波亮さんインタビュー【後編】

物理学者 難波亮さんインタビュー【前編】

数理生物学 研究者 入谷亮介さんインタビュー【前編】

理論物理学者 初田哲男さんインタビューvol.2 研究や数学について

理論物理学者 初田哲男さんインタビューvol.1 理研iTHEMSについて

気候変動って実際どうなの？【ヨビノリ×研究者】

Recipe for soup of quarks and gluons

A subjective view on what is a quantum effect

Mathematical aspects of the entropic uncertainty relation

Forming black holes from stars

Singularity Theorems

Resurgence: making sense out of non-convergent series

How can we use a quantum computer to study the ground state of the hydrogen molecule?

Applications and Extensions of the Nielsen-Ninomiya Theorem in Condensed Matter Physics

COVID-19: then, now, and into the future

Exploring Quantum Spacetime

Classical simulations of quantum computers

When a Cretan says all Cretans are liars

Physical and local observables in gravitational theory

Can you hear the shape of a drum?

Quantum many-body physics with cold atoms

complexity in non-unitary dynamics of photons

Physics Through the Looking Glass

A new B.O.A.T. in astrophysics

Evolution and our daily rhythms

Area law of entanglement entropy in quantum many body systems and its implication in tensor network calculation

Comparison between conventional computers and quantum computers

A glimpse of enumerative geometry

Message-passing algorithms for graphical models

Canonical form of tensor networks in one and two dimensions

The basics of topological band theory

Building something from nothing: a mathematical framework for aperiodic/amorphous sets

Planetary lightning: Current State-of-the-art and outstanding questions

Collective Power of Science ~ from the High-Energy Atmospheric Physics to our New Exploration of the Universe ~

Morse theory and Floer theory

Knot theory and topological semimetals

On Dark Matter

Odd couples of interdisciplinary research

Khovanov homology theory - an introduction to categorification by Dr. Taketo Sano on May 13, 2022

ファンダメンタルズ フェスmini プレイベント 科学篇 「探究と架橋：基礎科学の可能性」

Pcペンタクォークをもとめて―「富岳」でハドロン間相互作用を探る