179件のイベント / 2024年
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Probing structure of neutron stars through X-ray bursters
2024年1月12日(金) 14:00 - 15:15
土肥 明 (理化学研究所 開拓研究本部 (CPR) 長瀧天体ビッグバン研究室 基礎科学特別研究員)
Type-I X-ray bursts are rapidly brightening phenomena triggered by the nuclear burning of light elements near the surface of accreting neutron stars. Most of the X-ray bursters show irregular behavior of light curves. However, some X-ray bursters are somehow quite regular, i.e., constant recurrence time and constant shaper of light curves, and are often called Clocked bursters, which are powerful sites to probe uncertainties of many model parameters such as accretion rate, the composition of accreted matter, reaction rates, neutron star structure, and temperature. In this study, we focus on the uncertainties of the equation of states, which determines the latter two properties. Based on our numerical models covering whole areas of neutron stars, we will present their impact on X-ray burst light curves. Furthermore, we will discuss the possibility of constraining the equation of states from Clocked bursters such as GS 1826-24 and 1RXS J180408.9-342058.
会場: セミナー室 (359号室) (メイン会場) / via Zoom
イベント公式言語: 英語
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Seoul National University student group visit
2024年1月10日(水) 14:00 - 20:00
カトゥリン・ボシゥメン (数理創造プログラム 副プログラムディレクター)
田中 章詞 (理化学研究所 革新知能統合研究センター (AIP) 上級研究員)
辰馬 未沙子 (数理創造プログラム 研究員)
難波 亮 (数理創造プログラム 上級研究員)
金 東昱 (数理創造プログラム 特別研究員)
シュテッフェン・バッケス (数理創造プログラム 上級研究員)A group of 22 undergraduate students in the GLEAP programme at Seoul National University will visit iTHEMS to hear short talks by our members, exchange one-on-one, and visit our facilities. I would like to encourage all available iTHEMS members to take part in this event which will be held in different spaces throughout the day, all at the RIKEN Wako campus Main Research Building: 15:50-16:10 at iTHEMS Common Room (#246-248) Coffee break with iTHEMS members and SNU visitors 16:10-17:50 on 4th floor, room #435-437 Short talks by iTHEMS members 18:05-18:30 in 3rd floor common space Short intro talks by SNU visitors 18:30-20:00 in 3rd floor common space Free informal discussion between SNU visitors and iTHEMS members over some light food [Note some slight changes in the times previously announced]
会場: 研究本館 3階 共有スペース / 研究本館 435-437号室 / コモンルーム (246-248号室)
イベント公式言語: 英語
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セミナー
Symmetry Topological field theory for Subsystem symmetry
2024年1月9日(火) 15:00 - 16:00
Qiang Jia (Research Fellow, School of Physics, Korea Institute for Advanced Study (KIAS), Republic of Korea)
We generalize the idea of symmetry topological field theory (SymTFT) to subsystem symmetry. We propose the 2-foliated BF theory with level N in (3+1)d as subsystem SymTFT for subsystem Z_N symmetry in (2+1)d. Focusing on N=2, we investigate various topological boundaries. The subsystem Kramers-Wannier and Jordan-Wigner dualities can be viewed as boundary transformations of the subsystem SymTFT and are included in a larger duality web from the subsystem SL(2,Z_2) symmetry of the bulk foliated BF theory.
会場: via Zoom / セミナー室 (359号室)
イベント公式言語: 英語
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ワークショップ
Functional Renormalization Group at Niigata 2024
2024年1月7日(日) - 8日(月)
ゲルゲイ・フェヨシュ (Assistant Professor, Institute of Physics, Eötvös Loránd University, Hungary)
福嶋 健二 (東京大学 大学院理学系研究科 物理学専攻 教授)
奥西 巧一 (新潟大学 理学部 准教授)
春名 純一 (京都大学 大学院理学研究科 博士課程)
Xu-Guang Huang (Professor, Physics Department and Center for Particle Physics and Field Theory, Fudan University, China)
伊藤 克美 (新潟大学 教育学部 教授)
川名 清晴 (Research Fellow, Korea Institute for Advanced Study (KIAS), Republic of Korea)
藪中 俊介 (日本原子力研究開発機構 研究員)
横田 猛 (数理創造プログラム 基礎科学特別研究員)One of the most fundamental challenges in theoretical physics is to uncover the physical properties of strongly-interacting quantum many-body systems. This problem is shared in both subatomic physics and condensed matter physics; e.g., to unveil ground state structures and dynamical aspects of quantum systems. However, it has been an unresolved issue to establish non-perturbative theoretical tools, which allows a reliable analytic approach to quantum many-body problems described by field theory. The Functional Renormalization Group (FRG) is proposed as one of the theoretical methods that facilitates the non-perturbative investigation of quantum many-body systems. The FRG has found applications in various fields of physics, ranging from particle and nuclear physics to condensed matter physics, leading to several unique achievements in each fields. The aim of this two-day workshop is to provide an overview of the recent applications and progress of FRG in various fields of physics, discuss future directions, and explore potential new collaborations that bridge different fields of physics.
会場: 開志専門職大学 米山キャンパス (メイン会場) / via Zoom
イベント公式言語: 英語
179件のイベント / 2024年
イベント
カテゴリ
シリーズ
- iTHEMSコロキウム
- MACSコロキウム
- iTHEMSセミナー
- iTHEMS数学セミナー
- Dark Matter WGセミナー
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- 理論物理学セミナー
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- Quantum Gravity Gatherings
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- Asymptotics in Astrophysics SG Seminar
- GW-EOS WGセミナー
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- Lab-Theory Standing Talks
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- Number Theory Seminar
- 産学連携数理レクチャー
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