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Fukushima Lab
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A theory lab that pursues the theory of quarks and gluons, quantum chromodynamics.
AboutAbout the lab
Strikingly complex physics from simple equations
Fukushima Lab conducts theoretical research on quantum chromodynamics (QCD), the fundamental theory of the strong interaction.
The interactions between quarks and gluons are described by simple equations, yet remarkably complex and fascinating physics emerges from them.
The lab studies the properties of QCD matter at high temperature and high density, the phenomenology of heavy-ion collision experiments, and the equation of state of dense nuclear matter and quark matter.
It also covers a broad range of topics, extending to fundamental problems in quantum field theory.
Key terms
- Quark
- An elementary particle that carries color charge. It is affected by all four fundamental interactions in nature.
- Gluon
- A particle that mediates the interaction between quarks. It also interacts with itself.
- Hadron
- A general term for composite particles made of quarks and gluons. Protons and neutrons are also hadrons.
NewsLab news
A paper by Prof. Fukushima and colleagues was published in Phys.Rev.D
A joint information session for the A0 subcourse (Nuclear Theory) was held
A paper by Prof. Fukushima and colleagues was published in JHEP
A paper by Prof. Fukushima and colleagues was published in Physical Review D
A paper by Prof. Fukushima and colleagues was published in Physics Letters B
ResearchResearch themes
The lab conducts theoretical research on quantum chromodynamics (QCD), the fundamental theory of the strong interaction. It covers a broad range of topics, including the properties of QCD matter at high temperature and high density, the phenomenology of relativistic heavy-ion collision experiments, the equation of state of dense nuclear matter and quark matter, and even fundamental problems in quantum field theory.
*Illustrative imageThe strong CP problem
The parameter θ, which measures the degree of CP violation in QCD, is known to be extremely close to zero with very high precision, and no one knows why. Its behavior in special environments, such as ultra-hot matter, is under discussion.
*Illustrative imagePerturbative QCD at high energy
At high energies, quarks and many gluons are excited inside the proton, giving it a form that looks nothing like the picture of the quark model. The lab calculates how this wave function changes with energy.
*Illustrative imageThe structure of the QCD vacuum
The QCD vacuum must have some mechanism that keeps hadrons stable as hadrons. The lab investigates the non-perturbative structure of the vacuum, including color confinement and the spontaneous breaking of chiral symmetry.
*Illustrative imageQCD at high temperature and high density
The QCD phase diagram describes how QCD matter changes as temperature and density are varied. The lab studies the transition from the hadron phase to the quark-gluon plasma and the nature of phase transitions at high density.
MembersFaculty
The members of Fukushima Lab consist of faculty staff and students in the doctoral and master's programs.As of 2026
- ProfessorKenji FukushimaPublications ↗
- Assistant ProfessorYui Hayashi
- Project Assistant ProfessorSyo Kamata
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: “Lead-Ion Collision at NA49-CERN” CERN PhotoLab / CC BY 4.0 (cropped)
- The strong CP problem: “Neutron Quark Structure” Bakeed / CC0 (cropped)
- Perturbative QCD at high energy: “CTEQ6 parton distribution functions” User Ylai on en.wikipedia / Public domain (cropped)
- The structure of the QCD vacuum: “Fluxtube meson” RolteVolte / Public domain (cropped)
- QCD at high temperature and high density: “Quark-gluon-plasma” S13mashina / CC BY-SA 4.0 (cropped)
- Related lab (Liang Lab): “NuclideMap stitched 2” NuclideMap.PNG: The viewer derivative work: Neokortex (talk) / Public domain (cropped)
- Related lab (Yokoyama Lab): “Oldest Light in the Universe (SVS30133)” NASA's Scientific Visualization Studio - Marit Jentoft-Nilsen, Global Science and Technology, Inc./Mark Malanoski / Public domain (cropped)
- Related lab (Suzuki Lab): “RIKEN Superconducting Ring Cyclotron P4208172” Kestrel / CC BY-SA 4.0 (cropped)
- Related lab (Yamazaki Lab): “E8Petrie with color 3D vertices” Jgmoxness / CC BY-SA 4.0 (cropped)
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