ニュース
65件のニュース / 2025年
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2025-02-10
プレスリリース
急性肝障害はどのような人が急性肝不全に進展しやすいのか？
九州大学病院 肝臓・膵臓・胆道内科/九州大学 大学院医学研究院の小川 佳宏 主幹教授、田中 正剛 助教、黒川 美穂 博士後期課程学生らの研究グループは、名古屋大学 大学院理学研究科の岩見 真吾 教授（兼 九州大学マス・フォア・インダストリ研究所 客員教授、理化学研究所 数理創造プログラム 客員研究員、京都大学高等研究院ヒト生物学高等研究拠点 連携研究者）、吉村 雷輝 博士後期課程学生らとの人工知能（AI）技術を臨床研究に応用した共同研究により、急性肝障害患者は治療効果（治療反応性）により3つの集団に分類できることを新たに発見しました。さらに、初診時の血液検査などの臨床情報を用いることにより、患者がどの集団に属するのかを予測するAIモデルの開発に世界で初めて成功しました。 詳細は関連リンクより九州大学のホームページをご覧ください。
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2025-02-06
今週の論文Week 2, February 2025
Title: Investigating the Bouncing Barrier with Collision Simulations of Compressed Dust Aggregates Author: Haruto Oshiro, Misako Tatsuuma, Satoshi Okuzumi, Hidekazu Tanaka arXiv: http://arxiv.org/abs/2502.03107v1 Title: Renormalization-group approach to the Kohn-Luttinger superconductivity: Amplification of the pairing gap from $\ell^4$ to $\ell$ Author: Yuki Fujimoto arXiv: http://arxiv.org/abs/2502.01169v1 Title: $NJ/ψ$ and $Nη_c$ interactions from lattice QCD Author: Yan Lyu, Takumi Doi, Tetsuo Hatsuda, Takuya Sugiura arXiv: http://arxiv.org/abs/2502.00054v1 Title: Identification of finite circular metric spaces by magnitude and Riesz energy Author: Hiroki Kodama, Jun O'Hara arXiv: http://arxiv.org/abs/2408.06091v3 Title: Computing theta-dependent mass spectrum of the 2-flavor Schwinger model in the Hamiltonian formalism Author: Akira Matsumoto, Etsuko Itou, Yuya Tanizaki arXiv: http://arxiv.org/abs/2501.18960v2 Title: Novel Lattice Formulation of 2D Chiral Gauge Theory via Bosonization Author: Okuto Morikawa, Soma Onoda, Hiroshi Suzuki arXiv: http://arxiv.org/abs/2501.18949v1 Title: Biological invasion by the cycad-specific scale pest Aulacaspis yasumatsui (Diaspididae) into Cycas revoluta (Cycadaceae) populations on Amami-Oshima and Okinawa-jima, Japan Author: Benjamin E. Deloso, José Said Gutiérrez-Ortega, Jui-Tse Chang, Yasuko Ito-Inaba, Anders J. Lindström, L. Irene Terry, John Donaldson, William Tang, Ronald D. Cave, Jorge Antonio Gómez-Díaz, Vanessa M. Handley, M. Patrick Griffith, Thomas E. Marler Journal Reference: Plant Species Biology doi: https://doi.org/10.1111/1442-1984.12505 Title: Spacetime profile of electromagnetic fields in intermediate-energy heavy-ion collisions Author: Hidetoshi Taya arXiv: http://arxiv.org/abs/2501.18171v1
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2025-01-31
セミナーレポート
Quantum Computation SG Seminar by Suguru Endo on January 28, 2025
In this 2-day lecture, Dr. Endo reviewed quantum error mitigation, which offers a practical approach to reducing errors in noisy intermediate-scale quantum (NISQ) devices without requiring the encoding of qubits. The first day started by discussing the fundamentals of noise modeling in quantum systems, and then we overviewed concrete examples of QEM techniques, including extrapolation, probabilistic error cancellation (PEC), virtual distillation, quantum subspace expansion, and Clifford data regression. After that, the lecturer presented advanced QEM methods, such as the stochastic PEC approach, which mitigates the effects of Lindblad terms in Lindblad master equations and the generalized quantum subspace expansion, which is a unified framework of QEM. In the second day, the lecturer introduced recent research topics including information-theoretic analysis of QEM, connections to non-Markovian dynamics, combination of QEM with quantum error correction toward the early fault-tolerant quantum computing era. The lecture attracted attendees with wide research backgrounds ranging from quantum information to condensed matter, nuclear, and particle physics. Reported by Yuta Sekino
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2025-01-30
今週の論文Week 5, January 2025
Title: $Λ$(1405) in the flavor SU(3) limit using a separable potential in the HAL QCD method Author: Kotaro Murakami, Sinya Aoki arXiv: http://arxiv.org/abs/2501.17423v1 Title: Multi-Messenger and Cosmological Constraints on Dark Matter through Two-Fluid Neutron Star Modeling Author: Ankit Kumar, Sudhakantha Girmohanta, Hajime Sotani arXiv: http://arxiv.org/abs/2501.16829v1 Title: Left-hand cut and the HAL QCD method Author: Sinya Aoki, Takumi Doi, Yan Lyu arXiv: http://arxiv.org/abs/2501.16804v1 Title: Reconstruction of QCD first-order phase transition from neutron star measurements Author: Ronghao Li, Sophia Han, Zidu Lin, Lingxiao Wang, Kai Zhou, Shuzhe Shi arXiv: http://arxiv.org/abs/2501.15810v1 Title: Synthesis of a semimetallic Weyl ferromagnet with point Fermi surface Author: Ilya Belopolski, Ryota Watanabe, Yuki Sato, Ryutaro Yoshimi, Minoru Kawamura, Soma Nagahama, Yilin Zhao, Sen Shao, Yuanjun Jin, Yoshihiro Kato, Yoshihiro Okamura, Xiao-Xiao Zhang, Yukako Fujishiro, Youtarou Takahashi, Max Hirschberger, Atsushi Tsukazaki, Kei S. Takahashi, Ching-Kai Chiu, Guoqing Chang, Masashi Kawasaki, Naoto Nagaosa, Yoshinori Tokura Journal Reference: Nature (2025) doi: https://doi.org/10.1038/s41586-024-08330-y Title: Grassmann Tensor Renormalization Group for two-flavor massive Schwinger model with a theta term Author: Hayato Kanno, Shinichiro Akiyama, Kotaro Murakami, Shinji Takeda arXiv: http://arxiv.org/abs/2501.14086v1 Title: Pair Correlation of Zeros of the Riemann Zeta Function I: Proportions of Simple Zeros and Critical Zeros Author: Siegfred Alan C. Baluyot, Daniel Alan Goldston, Ade Irma Suriajaya, Caroline L. Turnage-Butterbaugh arXiv: http://arxiv.org/abs/2501.14545v1
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2025-01-29
プレスリリース
Make it worth Weyl: engineering the first semimetallic Weyl quantum crystal
An international research team, including Ching-Kai Chiu (Senior Research Scientist, iTHEMS) and led by the Strong Correlation Quantum Transport Laboratory of the RIKEN Center for Emergent Matter Science (CEMS) has achieved a world-first by realizing an ideal Weyl semimetal, marking a major breakthrough in quantum materials research. Weyl fermions emerge as quantum excitations of electrons in crystals and are predicted to exhibit exotic electromagnetic properties. However, previous Weyl materials were often overshadowed by unwanted electronic states, making it difficult to observe pure Weyl fermion behavior. The team successfully engineered an ideal Weyl semimetal by precisely controlling the composition of the topological semiconductor (Cr,Bi)2Te3, eliminating irrelevant electronic states. Published in Nature, this work opens new possibilities for terahertz (THz) light devices and next-generation electronics. For more details, please refer to the related link.
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2025-01-28
受賞情報
Lingxiao Wang received the “Best ‘Physics for AI’ Paper Award”
Our colleague Lingxiao Wang (Research Scientist, iTHEMS) has received the “Best ‘Physics for AI’ Paper Award” of the Machine Learning and the Physical Sciences Workshop. The winning paper is entitled “Higher-order cumulants in diffusion models”. Congratulations, Lingxiao!
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2025-01-24
ホットトピック
Farewell message from Liang Zhang
Our colleague, Liang Zhang, has returned to the Shanghai Institute of Applied Physics at the University of Chinese Academy of Sciences to complete his PhD thesis. We will all miss him and wish him the very best of luck in successfully defending his thesis ! Here is a message from Liang Zhang: I joined iTHEMS in January 2023 as a joint student and completed my two-year journey here in January 2025. I initially joined iTHEMS to study lattice QCD and the HAL QCD method, and I am deeply grateful to Hatsuda-san and Doi-san for guiding me into this fascinating field. However, I soon realized that my experience at iTHEMS extended far beyond my original purpose. For example I had a discussion with Namba san on chiral symmetry breaking which is studied in both particle physics and cosmology. It left an immediate impression that physics is so universal other than reading such sentences in textbooks. And the interdisciplinary energy at iTHEMS constantly amazed me. When I first came here I always struggled to pinpoint people’s major. In some seminars, theoretical physicists gave a biology talk (like Christy)! I vaguely feel like there is a group theory for nature which can be expressed to different representations, biological, mathematical, physical, etc. Is this what the “i” in iTHEMS means? At last I would like to thank everyone in iTHEMS again for my two-year experience here. This experience gives me a great impulse to expand the possibilities of my future research life. iTHEMS’s uniqueness lies in its boundless possibilities. And I dearly hope our paths will cross again!
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2025-01-23
今週の論文Week 4, January 2025
Title: Numerical simulation of fractional topological charge in $SU(N)$ gauge theory coupled with $\mathbb{Z}_N$ 2-form gauge fields Author: Motokazu Abe, Okuto Morikawa arXiv: http://arxiv.org/abs/2501.11438v1 Title: On the connected sums of the $(2,1)$-cable of the figure eight knot Author: Yoshihiro Fukumoto, Masaki Taniguchi arXiv: http://arxiv.org/abs/2501.07910v1 Title: Lifetime measurement of the muonic atom of enriched Si isotopes Author: R. Mizuno, M. Niikura, S. Akamatsu, T. Fujiie, K. Ishida, T. Ito, T. Kikuchi, T. Matsuzaki, F. Minato, J. Murata, T. Naito, K. Shimomura, S. Takeshita, I. Umegaki, Y. Yamaguchi arXiv: http://arxiv.org/abs/2501.05897v1 Title: On the slice-torus invariant $q_M$ from $\mathbb{Z}_2$-equivariant Seiberg--Witten Floer cohomology Author: Nobuo Iida, Taketo Sano, Kouki Sato, Masaki Taniguchi arXiv: http://arxiv.org/abs/2501.07788v1 Title: Tridiagonal Hamiltonians modeling the density of states of the Double-Scaled SYK model Author: Pratik Nandy Journal Reference: JHEP 01 (2025) 072 doi: https://doi.org/10.1007/JHEP01(2025)072 arXiv: http://arxiv.org/abs/2410.07847v2
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2025-01-17
ホットトピック
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: 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"!
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2025-01-16
今週の論文Week 3, January 2025
Title: Direct Monte Carlo computation of the 't~Hooft partition function Author: Okuto Morikawa, Hiroshi Suzuki arXiv: http://arxiv.org/abs/2501.07042v1 Title: Impact of dark matter distribution on neutron star properties Author: Ankit Kumar, Hajime Sotani arXiv: http://arxiv.org/abs/2501.07052v1 Title: Physics-Driven Learning for Inverse Problems in Quantum Chromodynamics Author: Gert Aarts, Kenji Fukushima, Tetsuo Hatsuda, Andreas Ipp, Shuzhe Shi, Lingxiao Wang, Kai Zhou Journal Reference: Nature Reviews Physics (2025) doi: https://doi.org/10.1038/s42254-024-00798-x arXiv: http://arxiv.org/abs/2501.05580v1
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2025-01-10
ホットトピック
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 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.)
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2025-01-10
プレスリリース
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。
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2025-01-09
今週の論文Week 2, January 2025
Title: Imaginary Hamiltonian variational ansatz for combinatorial optimization problems Author: Xiaoyang Wang, Yahui Chai, Xu Feng, Yibin Guo, Karl Jansen, Cenk Tüysüz arXiv: http://arxiv.org/abs/2408.09083v2 Title: GRB Redshift Classifier to Follow-up High-Redshift GRBs Using Supervised Machine Learning Author: Maria Giovanna Dainotti, Shubham Bhardwaj, Christopher Cook, Joshua Ange, Nishan Lamichhane, Malgorzata Bogdan, Monnie McGee, Pavel Nadolsky, Milind Sarkar, Agnieszka Pollo, Shigehiro Nagataki arXiv: http://arxiv.org/abs/2408.08763v3 Title: Isosceles trapezoids of unit area with vertices in sets of infinite planar measure Author: Junnosuke Koizumi arXiv: http://arxiv.org/abs/2501.01914v1 Title: From planar to annular to toroidal bracket polynomials for pseudo knots and links Author: Ioannis Diamantis, Sofia Lambropoulou, Sonia Mahmoudi arXiv: http://arxiv.org/abs/2501.00736v1 Title: Monte Carlo simulation of the $SU(2)/\mathbb{Z}_2$ Yang--Mills theory Author: Motokazu Abe, Okuto Morikawa, Hiroshi Suzuki arXiv: http://arxiv.org/abs/2501.00286v1 Title: Deep learning for exploring hadron-hadron interactions Author: Lingxiao Wang arXiv: http://arxiv.org/abs/2501.00374v1
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2025-01-02
今週の論文Week 1, January 2025
Title: QCD sum rule approach to Okamoto-Nolen-Schiffer anomaly Author: Hiroyuki Sagawa, Tomoya Naito, Xavier Roca-Maza, Tetsuo Hatsuda arXiv: http://arxiv.org/abs/2412.19851v1 Title: Jackiw-Teitelboim Gravity and Lorentzian Quantum Cosmology Author: Masazumi Honda, Hiroki Matsui, Kota Numajiri, Kazumasa Okabayashi arXiv: http://arxiv.org/abs/2412.20398v1 Title: Phase and equation of state of finite density QC$_2$D at lower temperature Author: Etsuko Itou, Kei Iida, Kotaro Murakami, Daiki Suenaga arXiv: http://arxiv.org/abs/2412.18825v1 Title: Violation of Parity and Flavor Symmetries in a Nambu-Jona-Lasinio Model Author: Yukimi Goto, Tohru Koma arXiv: http://arxiv.org/abs/2412.19244v1
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2025-01-02
プレスリリース
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。
65件のニュース / 2025年