Featured News
Interdisciplinary Theoretical and Mathematical Sciences Program (iTHEMS) is an international research program at RIKEN. It facilitates close collaborations among researchers from different disciplines in theoretical, mathematical and computational sciences. The ultimate goal of iTHEMS is to unravel the mystery of the Universe, matter, and life, as well as to solve key problems in modern society through interdisciplinary approaches.
Upcoming Events
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Seminar Today
Response to sounds in the cochlea of the inner ear
September 26 (Tue) at 16:00 - 17:00, 2023
Takeru Ota (Assistant Professor, Division of Glocal Pharmacology, Department of Pharmacology, Graduate School of Medicine, Osaka University)
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Workshop
The 4th "Medicine and Mathematics" Workshop
September 29 (Fri) - 30 (Sat), 2023
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Seminar
Interactions between Algebraic Topology and Representation Theory by Toric Code
October 2 (Mon) - 4 (Wed), 2023
Minkyu Kim (Research Fellow, School of Mathematics, Korea Institute for Advanced Study (KIAS), Republic of Korea)
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Seminar
Progenitors and Explosion Properties of Supernova Remnants Hosting Central Compact Objects
October 6 (Fri) at 10:00 - 11:30, 2023
Chelsea Braun (Ph.D. Student, Department of Physics and Astronomy, University of Manitoba, Canada)
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Workshop
Introduction to F-Theory
October 18 (Wed) - 20 (Fri), 2023
Shun'ya Mizoguchi (Associate Professor, High Energy Accelerator Research Organization (KEK))
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Seminar
Topological Aspect of Adsorption Site Selectivity on Metal Surfaces
October 24 (Tue) at 13:30 - 15:00, 2023
Yuta Tsuji (Associate Professor, Faculty of Engineering Sciences, Kyushu University)
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Seminar
Mathematical modelling of the host response to inhalational anthrax across different scales
October 31 (Tue) at 16:00 - 17:00, 2023
Bevelynn Williams (Postdoctoral Fellow, School of Mathematics, University of Leeds, UK)
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Seminar
Early Formation of Dark Matter Halos
November 24 (Fri) at 14:00 - 15:15, 2023
Derek Beattie Inman (Research Scientist, iTHEMS)
Opportunities
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Seeking a few Postdoctoral Researchers (RIKEN-Berkeley Fellow associated with N3AS) (W22284)
Deadline: Open until filled
Postdoctoral Researcher (RIKEN-Berkeley Fellow associated with N3AS), a few positions. Theoretical works associated with neutrino physics, nucleosynthesis, dense matter and neutron stars, dark matter, astrophysical simulations, lattice QCD simulations and related fields. Successful applicants will work and spend the first three months at the RIKEN Wako campus, and the remainder of the years at the RIKEN Berkeley Center at the University of California, Berkeley on a long term business trip. The appointments of the RIKEN Berkeley Fellow are made through RIKEN iTHEMS.
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Seeking Postdoctoral Researcher, Research Scientist and Senior Research Scientist (W22219)
Deadline: Open until filled
Postdoctoral Researcher, Research Scientist and Senior Research Scientist, about 10 in total. Depending on experience, performance and ability, they are employed as postdoctoral researchers (3-year term), research scientists (5-year term) or senior research scientists (7-year term). This call is for researchers to work in iTHEMS in collaboration with one of the following laboratories participating in RIKEN Quantum (work concurrently with one of the following laboratories as needed), and to carry out research in quantum computational science and related fields. RIKEN Quantum aims to promote fundamental science based on quantum computational science, and the successful candidate will not only conduct top-level research on their own topic, but also contribute to building common ground in mathematics, physics, chemistry, life sciences, information sciences, computational science, humanities and social sciences through quantum computational science.
Latest News
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2023-09-21
Paper of the WeekWeek 4, September 2023
Title: Dynamical chirality production in one dimension Author: Tomoya Hayata, Katsumasa Nakayama, Arata Yamamoto arXiv: http://arxiv.org/abs/2309.08820v1 Title: Chemical potential (in)dependence of hadron scatterings in the hadronic phase of QCD-like theories and its applications Author: Kotaro Murakami, Etsuko Itou, Kei Iida arXiv: http://arxiv.org/abs/2309.08143v1 Title: Zariski dense discontinuous surface groups for reductive symmetric spaces Author: Kazuki Kannaka, Takayuki Okuda, Koichi Tojo arXiv: http://arxiv.org/abs/2309.08331v1 Title: Limits to Fluctuation Dynamics Author: Ryusuke Hamazaki arXiv: http://arxiv.org/abs/2309.07301v1 Title: Genus-$g$, $n$-point, $b$-boundary, $c$-crosscap correlation functions of two-dimensional conformal field theory: Definition and general properties Author: Xun Liu arXiv: http://arxiv.org/abs/2309.07528v1
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2023-09-18
Seminar ReportQuantum Matter Seminar by Ashley Cook on September 14, 2023
In a recent online seminar for RIKEN iTHEMS' QMSG series, Dr. Ashley Cook of the Max Planck Institute for Complex Systems delved into her interesting research on topological skyrmion phases in electronic systems. The talk was centered on non-interacting electronic topological phases that feature a skyrmion in their momentum-space spin polarization. After a succinct introduction that framed the talk within the broader context of topological classification in condensed matter physics, Dr. Cook pivoted to explore quantum skyrmion structures in momentum space. She specifically discussed these structures in the context of expected spin polarization in the ground state of centrosymmetric superconductors. Intriguingly, she demonstrated that the topological protection of the skyrmion number extends to the electronic structure through a generalized bulk-boundary correspondence, after accounting for non-spin degrees of freedom. This results in the formation of unique edge states that bridge one types of the energy bands (conduction bands and valence bands). Moreover, Dr. Cook emphasized that the adiabatic pumping of these edge states signifies the flow of quantum skyrmions. She suggested that this insight necessitates a reevaluation of the theoretical framework for the quantum Hall effects, which was initially conceived around point charges nearly half a century ago. Her work, therefore, not only suggests a pathway to discover new forms of topological boundary states but also calls for a more nuanced classification of topological states in electronic matter, beyond the limitations of the "tenfold way." The talk sparked a lively discussion, underscoring its significance and the excitement it generated among the participants. We extend our gratitude to Dr. Ashley Cook for her illuminating and thought-provoking contribution. Reported by Ching-Kai Chiu (iTHEMS) and Thore Posske (University of Hamburg, Germany)
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2023-09-14
Paper of the WeekWeek 3, September 2023
Title: Dynamic relationship between XRP price and correlation tensor spectra of the transaction network Author: Abhijit Chakraborty, Tetsuo Hatsuda, Yuichi Ikeda arXiv: http://arxiv.org/abs/2309.05935v1 Title: Greybody Factors Imprinted on Black Hole Ringdowns: an alternative to superposed quasi-normal modes Author: Naritaka Oshita arXiv: http://arxiv.org/abs/2309.05725v1 Title: Symmetry-resolved Entanglement Entropy, Spectra & Boundary Conformal Field Theory Author: Yuya Kusuki, Sara Murciano, Hirosi Ooguri, Sridip Pal arXiv: http://arxiv.org/abs/2309.03287v1
Upcoming Visitors
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Bevelynn Williams
Postdoctoral Fellow, School of Mathematics, University of Leeds, UKTerm: October 28 (Sat) - November 12 (Sun), 2023Visiting Place: RIKEN Wako Campus