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Elementary Particle Theory Lab
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The lab builds theories that describe invisible elementary particles in a unified way.
AboutAbout the lab
New theories born from a spirit of independence.
The Elementary Particle Theory Lab searches for and constructs theories that describe invisible elementary particles in a unified way.
Aiming to complete a theory of quantum gravity and to understand quantum field theory, the lab draws on theories of every kind from physics and mathematics.
Its research topics range from superstring theory and the holographic principle, to field theory and mathematical physics, QCD and strongly correlated condensed matter systems, and black holes and cosmology.
Regardless of age or position, faculty members and students discuss on an equal footing and stimulate one another in their research.
Key terms
- Superstring theory
- A theory that regards elementary particles not as points but as vibrations of extremely small strings
- Quantum gravity
- A theory, not yet complete, for treating gravity consistently with quantum mechanics
- Standard Model
- The basic theory of current particle physics, which explains elementary particles and the interactions between them
ResearchResearch themes
Elementary particle theory is the field that seeks and builds theories describing invisible elementary particles in a unified way. The lab aims to complete a theory of quantum gravity and to understand quantum field theory based on elementary particles.
*Illustrative imageTheory of Quantum Gravity and Quantum Field Theory
Drawing on theories of every kind from physics and mathematics, the lab aims to complete a theory of quantum gravity and to understand quantum field theory. It covers superstring theory, the holographic principle, QCD and strongly correlated condensed matter systems, and black holes and cosmology.
*Illustrative imageParticle Phenomenology
Why is the Standard Model made up of 17 kinds of elementary particles? What is dark matter? How can the beginning of the universe be understood in terms of elementary particles? The lab tries to open up breakthroughs through the many connections among theories, even down to how to formulate a unified model that includes gravity.
*Illustrative imageMathematical Physics and Computational Science
The lab studies new theoretical methods that make quantum field theory computable. Its work covers developing approaches that do not rely on perturbation theory, improving theories on a spacetime lattice, searching for solvable theories, and characterizing chaos.
MembersFaculty
The members of the Elementary Particle Theory Lab are faculty members and PhD and master's students.As of 2026
- ProfessorKoji Hashimoto
- ProfessorShigeki Sugimoto
- Associate ProfessorMasafumi Fukuma
- Associate ProfessorKoichi Yoshioka
- Assistant ProfessorKatsuyuki Sugiyama
- Program-Specific Associate ProfessorAkiyoshi Sannai
- Program-Specific Associate ProfessorNorihiro Tanahashi
- Program-Specific Assistant ProfessorTaiga Miyachi
- Affiliated Assistant ProfessorTaishi Kawamoto
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “String-interaction” Anna.g / CC BY-SA 3.0 (cropped)
- Theory of Quantum Gravity and Quantum Field Theory: “Penrose AdS Diagramm” Anton Sel / CC0 (cropped)
- Particle Phenomenology: “Standard Model Feynman Diagram Vertices” Garyzx / CC BY-SA 3.0 (cropped)
- Mathematical Physics and Computational Science: “PhasDiag” Rajeev S. Bhalerao(Tata Inst.) / CC BY 4.0 (cropped)
- Related lab (Particle Theory Lab (Yukawa Institute for Theoretical Physics)): “AdSE like hyp” Anton Sel / CC BY-SA 4.0 (cropped)
- Related lab (Theoretical Astrophysics Lab): “MergingBinaryBlackHoles” NASA/Ames Research Center/Christopher E. Henze / Public domain (cropped)
- Related lab (Metal Phase Science Lab): “Researcher using diamond anvil cell” Allison Pease, University of Michigan, USA / CC BY-SA 2.5 (cropped)
- Related lab (Nuclear Theory Lab): “Shape of nuclear shell” A2569875 / CC BY-SA 4.0 (cropped)
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