ニュース

18件のニュース / 2026年

2026-02-26
今週の論文
Week 5, February 2026

Title: Out-of-time-ordered correlators for turbulent fields: a quantum-classical correspondence Author: Motoki Nakata arXiv: http://arxiv.org/abs/2602.21710v1 Title: Evidence of Nuclear Urca Process in the Ocean of Neutron-Star Superburst MAXI J1752$-$457 Author: Hao Huang, Akira Dohi, Amira Aoyama, Tomoshi Takeda, Nobuya Nishimura arXiv: http://arxiv.org/abs/2602.19018v1 Title: A $y$-ification of Khovanov homology Author: Taketo Sano arXiv: http://arxiv.org/abs/2602.17435v1 Title: Prefactorization algebras for the conformal Laplacian: Central charge and Hilbert Fock space Author: Yuto Moriwaki arXiv: http://arxiv.org/abs/2602.17549v1 Title: Variation in soldier investment is linked to the evolution of termite soldier defense strategies Author: Akiya Satoh, Isaac Planas-Sitjà, Adam L. Cronin, Nobuaki Mizumoto Journal Reference: Evol Ecol 40, 21 (2026) doi: https://doi.org/10.1007/s10682-026-10386-3
2026-02-19
今週の論文
Week 4, February 2026

Title: On the efficiency of pairwise Hamiltonian control to desynchronize the higher-order Kuramoto model Author: Martin Moriamé, Riccardo Muolo, Timoteo Carletti, Maxime Lucas arXiv: http://arxiv.org/abs/2602.15279v1 Title: Quarkyonic matter and hadron-quark crossover from an ultracold atom perspective Author: Hiroyuki Tajima, Kei Iida, Toru Kojo, Haozhao Liang arXiv: http://arxiv.org/abs/2602.14113v1 Title: Estimation of neutron star mass and radius of FRB 20240114A by identification of crustal oscillations Author: Hajime Sotani, Zorawar Wadiasingh, Cecilia Chirenti arXiv: http://arxiv.org/abs/2602.14353v1 Title: Physical Predictions in Closed Quantum Gravity Author: Yasunori Nomura, Tomonori Ugajin arXiv: http://arxiv.org/abs/2602.13387v1 Title: Symmetry Spans and Enforced Gaplessness Author: Takamasa Ando, Kantaro Ohmori arXiv: http://arxiv.org/abs/2602.11696v1 Title: Payoff equivalence and complete strategy spaces of direct reciprocity Author: Philip LaPorte, Christian Hilbe, Nikoleta E. Glynatsi, and Martin A. Nowak Journal Reference: PNAS doi: https://doi.org/10.1073/pnas.2518486123
2026-02-12
今週の論文
Week 3, February 2026

Title: Lifts of cycles in tropical hypersurfaces and the Gamma conjecture Author: Yuto Yamamoto arXiv: http://arxiv.org/abs/2602.08666v1 Title: Comprehensive Table of Calculated Huff Factors Author: Yuichi Uesaka, Tomoya Naito, Shuichiro Ebata, Megumi Niikura arXiv: http://arxiv.org/abs/2602.07501v1 Title: Conformally flat factorization homology in Ind-Hilbert spaces and Conformal field theory Author: Yuto Moriwaki arXiv: http://arxiv.org/abs/2602.08729v1 Title: Optimal interaction functions realizing higher-order Kuramoto dynamics with arbitrary limit-cycle oscillators Author: Norihisa Namura, Riccardo Muolo, Hiroya Nakao Journal Reference: Chaos 36, 023120 (2026) doi: https://doi.org/10.1063/5.0307452 Title: Forecasting Supermassive Black Hole Binary Gravitational Wave Probes: Prospects for Future Pulsar Timing Array and Space-Borne Detectors Author: Katsunori Kusakabe, Yoshiyuki Inoue, Daisuke Toyouchi, Keitaro Takahashi arXiv: http://arxiv.org/abs/2602.06789v1 Title: Quantum statistical functions Author: Haruki Emori arXiv: http://arxiv.org/abs/2602.05821v1
2026-02-05
受賞情報

廣島渚客員研究員が第7回（2026年）米沢富美子記念賞を受賞

廣島渚客員研究員（横浜国立大学准教授）が、第7回（2026年）米沢富美子記念賞を受賞しました。米沢富美子記念賞は、日本物理学会の女性会員を対象に、物理学分野において優れた研究活動を行っている若手・中堅研究者を顕彰・奨励することを目的として設立された賞です。原則として最終学位取得後15年以内の研究者を対象とし、毎年若干名（概ね5名程度）が選出されます。廣島客員研究員は、宇宙の観測や理論モデルをもとに暗黒物質の性質に迫る理論研究に取り組んでおり、宇宙物理学的手法を用いた暗黒物質研究に関する一連の業績が高く評価され、今回の受賞に至りました。
2026-02-05
今週の論文
Week 2, February 2026

Title: Courant-Hilbert deformations of Yang-Baxter sigma models Author: Osamu Fukushima, Takaki Matsumoto, Kentaroh Yoshida arXiv: http://arxiv.org/abs/2602.04662v1 Title: Hurwitz-Radon numbers and proper actions of semisimple Lie groups Author: Kazuki Kannaka, Koichi Tojo arXiv: http://arxiv.org/abs/2602.04544v1 Title: von Neumann entropy of phase space structures in gyrokinetic plasma turbulence Author: Go Yatomi, Motoki Nakata arXiv: http://arxiv.org/abs/2602.00600v1 Title: When higher-order interactions enhance synchronization: the case of the Kuramoto model on random hypergraphs Author: Riccardo Muolo, Hiroya Nakao, Marco Coraggio arXiv: http://arxiv.org/abs/2508.10992v2 Title: Resource-Theoretic Quantifiers of Weak and Strong Symmetry Breaking: Strong Entanglement Asymmetry and Beyond Author: Yuya Kusuki, Sridip Pal, Hiroyasu Tajima arXiv: http://arxiv.org/abs/2601.20924v1 Title: Non-invertible translation from Lieb-Schultz-Mattis anomaly Author: Tsubasa Oishi, Takuma Saito, Hiromi Ebisu arXiv: http://arxiv.org/abs/2601.21625v1 Title: Probing the Diversity of Type Ia Supernova Remnants in 3-D Hydrodynamic Simulations with X-ray Spectral Synthesis Author: Yusei Fujimaru, Shiu-Hang Lee, Gilles Ferrand, Daniel Patnaude, Shigehiro Nagataki, Rüdiger Pakmor, Samar Safi-Harb, Friedrich K. Röpke, Anne Decourchelle, Ivo R. Seitenzahl arXiv: http://arxiv.org/abs/2601.20446v1
2026-02-03
ホットトピック

企画展「ミッション∞インフィニティ」で「Black Hole Recorder」を展示

株式会社ADKマーケティング・ソリューションズは、東京都現代美術館で開催中の企画展「ミッション∞インフィニティ｜宇宙＋量子＋芸術」（2026年1月31日〜5月6日）にて、 iTHEMSと制作した体験型サイエンスアート作品「Black Hole Recorder（ブラックホール・レコーダー）」を出展中です。この作品は、量子ブラックホール理論に着想を得た未来の情報ストレージのプロトタイプ模型。膨大なデータを蓄えるブラックホールをモチーフに、人間の声や音を記録し、遠い未来や宇宙へ届けるというコンセプトで展示されています。企画展では、宇宙や量子とアートを融合した作品を通じて、「見えない世界」や未来の可能性を体感できます。詳細は関連リンクをご覧下さい。
2026-01-29
今週の論文
Week 5, January 2026

Title: Direct numerical simulation of the 't Hooft partition function and (de)confining phases Author: Okuto Morikawa, Hiroshi Suzuki arXiv: http://arxiv.org/abs/2601.20159v1 Title: Generalizable Equivariant Diffusion Models for Non-Abelian Lattice Gauge Theory Author: Gert Aarts, Diaa E. Habibi, Andreas Ipp, David I. Müller, Thomas R. Ranner, Lingxiao Wang, Wei Wang, Qianteng Zhu arXiv: http://arxiv.org/abs/2601.19552v1 Title: Well-posedness of the Langmuir film problem Author: Yoichiro Mori, Shinya Okabe, Koya Sakakibara arXiv: http://arxiv.org/abs/2601.16482v1 Title: Exploring Noisy Quantum Thermodynamical Processes via the Depolarizing-Channel Approximation Author: Jian Li, Xiaoyang Wang, Marcus Huber, Nicolai Friis, Pharnam Bakhshinezhad arXiv: http://arxiv.org/abs/2601.16317v1
2026-01-29
受賞情報

エリック・ローツステット上級研究員が Physical Review Journals 優秀査読者（2026 Outstanding Referee）に選出

エリック・ローツステット上級研究員が、米国物理学会（American Physical Society: APS）が発行する学術誌 Physical Reviewにおける2026 Outstanding Refereeに選出されました。 Outstanding Referee プログラムは、Physical Review 誌の査読活動において特に顕著な貢献を行った研究者を表彰する制度で、2008年に創設されました。査読を通じて論文の質向上や可読性の改善に寄与し、学術誌の高い基準を支える重要な役割を担った研究者に授与されます。年間約10万人にのぼるアクティブな査読者の中から、報告書の質、件数、迅速性などを基準に、ごく限られた研究者が選出されます。ローツステット上級研究員は、計算物理学、計算化学、強光子場科学、量子コンピューティングなど複数の研究分野で活躍しており、これまでの査読活動における高い専門性と国際的な学術コミュニティへの貢献が評価され、今回の受賞に至りました。
2026-01-22
今週の論文
Week 4, January 2026

Title: Relic of quadrupole deformation produced in a hot neutron star era Author: Yasufumi Kojima, Akira Dohi, Shota Kisaka, Kotaro Fujisawa arXiv: http://arxiv.org/abs/2601.13550v1 Title: Onset of thermalization of q-deformed SU(2) Yang-Mills theory on a trapped-ion quantum computer Author: Tomoya Hayata, Yoshimasa Hidaka, Yuta Kikuchi arXiv: http://arxiv.org/abs/2601.13530v1 Title: Economic complexity and regional development in India: Insights from a state-industry bipartite network Author: Joel M Thomas, Abhijit Chakraborty arXiv: http://arxiv.org/abs/2601.12356v1 Title: Time delay embeddings to characterize the timbre of musical instruments using Topological Data Analysis: a study on synthetic and real data Author: Gakusei Sato, Hiroya Nakao, Riccardo Muolo Journal Reference: Eur. Phys. J. Spec. Top. (2026) doi: https://doi.org/10.1140/epjs/s11734-026-02132-1 Title: Shadow signatures and energy accumulation in Lorentzian-Euclidean black holes Author: Emmanuele Battista, Salvatore Capozziello, Che-Yu Chen arXiv: http://arxiv.org/abs/2601.10806v1 Title: Insights from the “Women in Evolutionary Biology Workshop” on gender equality in science Author: Stella Kyomen, Maria Alejandra Ramirez, Nikoleta E Glynatsi, Gisela T Rodríguez-Sánchez, Amanda de Azevedo-Lopes Journal Reference: Evolution doi: https://doi.org/10.1093/evolut/qpaf255
2026-01-15
ホットトピック

iTHEMS Colloquium by Hiroki R. Ueda on October 10, 2025

On October 10, 2025, Dr. Hiroki Ueda, Professor at the University of Tokyo’s Graduate School of Medicine and former Team Leader at RIKEN Center for Biosystems Dynamics Research (BDR), delivered a splendid iTHEMS Colloquium talk on the Wako campus. His lecture, titled “Why Do We Sleep? The Role of Calcium and Phosphorylation in Sleep,” attracted a wide audience—not only researchers from iTHEMS but also colleagues from other RIKEN centers, including the Pioneering Research Institute (PRI) and the Center for Brain Science (CBS), as well as administrative staff. The talk was highly engaging and accessible to specialists and non-specialists alike. Dr. Ueda began with an overview of the long history of sleep research and the major unsolved questions that continue to inspire the field. He then presented his group’s recent discoveries on the role of calcium in sleep regulation. He also introduced a new theoretical framework—the WISE (Wake Inhibition Sleep Enhancement) mechanism—together with its mathematical modeling. Because sleep is closely connected to our daily lives, the audience had many questions from diverse perspectives, and Dr. Ueda kindly addressed each of them in detail. During and after the colloquium, including at the dinner that followed, we had stimulating discussions with him about his group’s model and potential new directions for sleep research and related areas of life science. We are deeply grateful to Dr. Ueda for his inspiring lecture and for sharing his broad expertise with our community. (Photos: courtesy of Assistant Chikako Ota, RIKEN iTHEMS.) Reported by Gen Kurosawa
2026-01-15
プレスリリース

「バタフライ効果」を制御する新原理

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プリンシパル（数理創造研究センター予測科学研究チームチームディレクター）は、「バタフライ効果」で知られる決定論的カオスの予測可能性の限界を逆手に取り、効率的にカオスを制御する新たな数理的枠組みを構築しました。気象予測の根幹を成すデータ同化（観測を用いてモデルを自然の振る舞いに同期させるプロセス）とカオスの制御が数学的に双子の関係にあることを示す「双対性原理」を提唱しました。カオス自体を抑えるのではなく、カオス特有の高い感度を利用して、わずかな「介入」で扱いやすい「目標軌道」に自然の振る舞いを同期させます。これにより、予測限界を超えてカオスを制御する道筋を理論的に示しました。本研究成果は、例えば、モデルで描いた「台風が被害をもたらさないシナリオ（目標軌道）」に現実の自然現象を同期させるためにわずかな変化（介入）を加えるといった、将来の極端気象を回避するための防災・減災研究に向けた理論的な道筋を示すとともに、生態系や経済学など、カオス的な振る舞いを示すさまざまな分野での応用が期待されます。詳細は関連リンクをご覧下さい。
2026-01-15
プレスリリース

3,000億粒子の天の川銀河シミュレーションをAI×富岳で実現

平島敬也基礎科学特別研究員を含む国際共同研究グループは、人工知能（AI）とスーパーコンピュータ「富岳」のシステム全体（約15万ノード）を利用し、星や星間ガスなどを表す3,000億個の粒子を用いて星一つ一つまでを分解した世界最高解像度となる天の川銀河のシミュレーションを実現しました。本研究成果により、天の川銀河の渦状腕構造（渦巻銀河が持つ、円盤上で中心から外側に向かって渦を巻いて伸びる腕状の構造）や、銀河内の元素の循環、太陽系や生命の材料の起源解明に貢献することが期待されます。詳細は関連リンクをご覧下さい。
2026-01-15
今週の論文
Week 3, January 2026

Title: Equivalence of Doubly Periodic Tangles Author: Ioannis Diamantis, Sofia Lambropoulou, Sonia Mahmoudi arXiv: http://arxiv.org/abs/2310.00822v2 Title: Relaxation Process During Complex Time Evolution In Two-Dimensional Integrable and Chaotic CFTs Author: Chen Bai, Weibo Mao, Masahiro Nozaki, Mao Tian Tan, Xueda Wen arXiv: http://arxiv.org/abs/2601.09290v1 Title: Dissipative ground-state preparation of a quantum spin chain on a trapped-ion quantum computer Author: Kazuhiro Seki, Yuta Kikuchi, Tomoya Hayata, Seiji Yunoki arXiv: http://arxiv.org/abs/2601.08137v1 Title: Coherence of Supermassive Black Hole Binary Demographics with the nHz Stochastic Gravitational Wave Background Author: Katsunori Kusakabe, Yoshiyuki Inoue, Daisuke Toyouchi arXiv: http://arxiv.org/abs/2510.10548v2 Title: Extending the Handover-Iterative VQE to Challenging Strongly Correlated Systems: $N_2$ and Fe-S Cluster Author: Pilsun Yoo, Kyungmin Kim, Eyuel E. Elala, Shane McFarthing, Aidan Pellow, Johanna I. Fuks, Doo Hyung Kang, Pratanphorn Nakliang, Jaewan Kim, Himadri Pathak, Tomonori Shirakawa, Seiji Yunoki, June-Koo Kevin Rhee arXiv: http://arxiv.org/abs/2601.06935v1 Title: Dynamics of Interfaces in the Two-Dimensional Wave-Pinning Model Author: Shunsuke Kobayashi, Koya Sakakibara, Taikei Uechi arXiv: http://arxiv.org/abs/2601.04746v1
2026-01-08
ホットトピック

RIKEN–IBS Joint Workshop on Mathematical Approaches to Nature Held in Daejeon, Korea, December 9–12, 2025

In December 9–12, 2025, a collaborative workshop jointly organized by the Institute of Basic Science (IBS, Korea) and RIKEN was held in Daejeon, Korea. The workshop aimed to explore the unifying mathematical principles that underlie diverse natural phenomena—from the fundamental interactions that shape the universe to the complex behaviors observed in living systems. From RIKEN, iTHEMS researchers including Derek Inman, Ryo Namba, Alvaro Pastor Gutierrez, Shuntaro Aoki, Sungsik Kong, Amaury Micheli, Puttarak Jai-akson, Ryoko Oishi-Tomiyasu, Che-Yu Chen, and Christy Kelly delivered talks. All the presentations were impressive and thoughtfully prepared so that researchers from different fields could follow and appreciate the content. Indeed, there were many stimulating cross-disciplinary questions, and we enjoyed lively discussions over lunches and dinners, accompanied by excellent (and wonderfully spicy) food. Although the workshop was originally designed to foster collaboration between RIKEN and IBS, connections were already present—for example, through Shuntaro Aoki, a physicist at iTHEMS formerly at IBS, and Shingo Gibo, a mathematical biologist at IBS formerly at iTHEMS. This workshop further strengthened these ties and created new ones. The planning and local organization of the workshop were led by the center of Masahide Yamaguchi (IBS), Yusuke Yamada (IBS), and by Yuto Yamamoto and Ryo Namba at RIKEN iTHEMS, with strong support from IBS and the International Collaboration Section of the Global Strategy Division at RIKEN. We are deeply grateful for their dedicated efforts. I hope that the successful interactions fostered through this workshop will continue to develop even further. (Photos: courtesy of Director Satoshi Iso, RIKEN iTHEMS.) Reported by Gen Kurosawa
2026-01-08
今週の論文
Week 2, January 2026

Title: Phases of the $q$-deformed $\mathrm{SU}(N)$ Yang-Mills theory at large $N$ Author: Tomoya Hayata, Yoshimasa Hidaka, Hiromasa Watanabe arXiv: http://arxiv.org/abs/2601.03843v1 Title: Revisiting Spherically Symmetric Spacetime I: Geometro-Hydrodynamics Author: Puttarak Jai-akson, Yuki Yokokura arXiv: http://arxiv.org/abs/2601.03077v1 Title: Exceptional Lines and Excitation of (Nearly) Double-Pole Quasinormal Modes: A Semi-Analytic Study in the Nariai Black Hole Author: Nao Nakamoto, Naritaka Oshita arXiv: http://arxiv.org/abs/2601.00704v1 Title: Gauge Symmetry in Quantum Simulation Author: Masanori Hanada, Shunji Matsuura, Andreas Schafer, Jinzhao Sun arXiv: http://arxiv.org/abs/2512.22932v1
2026-01-08
セミナーレポート

GW-EOS WG Seminar by Pierbiagio Pieri on November 6, 2025

In this seminar, pairing phenomena in three kinds of quantum many-body systems were discussed. First, the speaker reviewed his work on the Bose-Fermi mixture, mainly focusing on the quasiparticles called Fermi-polarons. Second, inhomogeneous pairing fluctuations in a spin-polarized Fermi-Fermi mixture are reviewed. Finally, dissipations called mutual friction arising from interplay between Andreev bound states in the vortex core and delocalized thermal excitations were discussed for strongly interacting Fermi superfluids. Reported by Yuta Sekino
2026-01-06
受賞情報

楠亀裕哉客員研究員が第22回（令和7年度）日本学術振興会賞を受賞

数理創造研究センター数理基礎部門の楠亀裕哉客員研究員（九州大学高等研究院准教授）が、2025年12月16日に第22回（令和7年度）日本学術振興会賞を受賞しました。日本学術振興会賞は、創造性に富み優れた研究能力を有する若手研究者を早い段階で顕彰し、その研究意欲と研究の発展を支援することを目的として設けられた賞です。楠亀客員研究員は、量子重力・量子多体系の境界領域における新手法の開発と応用に関する研究において顕著な成果を挙げてきました。本受賞は、これらの研究成果とその学術的貢献が高く評価されたものです。授賞式は、2026年2月3日に日本学士院講堂で開催される予定です。
2026-01-01
今週の論文
Week 1, January 2026

Title: Geometric phase of exceptional point as quantum resonance in complex scaling method Author: Okuto Morikawa, Shoya Ogawa, Soma Onoda arXiv: http://arxiv.org/abs/2512.24528v1 Title: Tensor Computing Interface: An Application-Oriented, Lightweight Interface for Portable High-Performance Tensor Network Applications Author: Rong-Yang Sun, Tomonori Shirakawa, Hidehiko Kohshiro, D. N. Sheng, Seiji Yunoki arXiv: http://arxiv.org/abs/2512.23917v1 Title: Description of Baryon Mass Spectrum by Open Strings and Diquarks Author: Yuki Fujimoto arXiv: http://arxiv.org/abs/2512.24882v1 Title: Measuring out-of-time-order correlators on a quantum computer based on an irreversibility-susceptibility method Author: Haruki Emori, Hiroyasu Tajima arXiv: http://arxiv.org/abs/2512.22643v1 Title: Error and Disturbance as Irreversibility with Applications: Unified Definition, Wigner--Araki--Yanase Theorem and Out-of-Time-Order Correlator Author: Haruki Emori, Hiroyasu Tajima arXiv: http://arxiv.org/abs/2309.14172v3

18件のニュース / 2026年