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Kato Lab
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A quantum condensed matter theory lab that uses theory to explore the remarkable properties of superconductors, superfluids, and chiral materials.
AboutAbout the lab
Theoretical physics as materials science.
The Kato Lab specializes in condensed matter theory (quantum condensed matter physics) and studies phenomena that quantum mechanics produces inside materials.
Its central themes are the physics of superconducting states, superfluids and supersolids, and the magnetism and transport phenomena of chiral materials.
Superconductivity and superfluidity are prototype phenomena of quantum condensation and quantum many-body physics.
The lab is located on the Komaba Campus and accepts graduate students from both the Graduate School of Arts and Sciences and the Graduate School of Science.
Key terms
- Superfluidity
- A state in which a liquid at extremely low temperatures loses its viscosity and keeps flowing without friction. It occurs in liquid helium, among other substances.
- Quantum vortex
- A vortex that forms inside a superconductor or superfluid. The strength of the vortex can take only discrete values.
- Chiral
- The property of having a shape that cannot be superimposed on its mirror image, like the relationship between a right hand and a left hand.
NewsLab news
Paper published on the motion of topological defects in type-II superconductors
Prof. Kato publishes the textbook "Physics Lecture Course: Oscillations and Waves"
Paper selected as an Editors' Choice in JPSJ
A student received the Student Presentation Award (Division 6) from the Physical Society of Japan
Paper published on the FFLO state generated by antiferromagnetism in an organic conductor, with a press release
ResearchResearch themes
Under the banner of theoretical physics as materials science, the lab studies quantum condensed matter theory. Built on three pillars (superconductivity and superfluidity, chiral materials, and quantum spin systems), it uses theory to explore quantum phenomena inside materials.
*Illustrative imageSuperconductivity and Superfluidity
Superconductivity and superfluidity are prototype phenomena of quantum condensation and quantum many-body physics. The lab studies the dynamics of quantum vortices, junction systems, and spatially inhomogeneous systems, as well as their interaction with heat currents and spin currents and the control of these interactions.
*Illustrative imageChiral Materials
The lab studies metals, magnets, and superconductors whose structures cannot be superimposed on their mirror images. It deals with spin polarization induced by chirality, a large electromagnetic effect, and asks whether DNA or quartz crystals could take the place of magnets.
*Illustrative imageQuantum Spin Systems
The difference between half-integer spins and integer spins is a classic example of a quantum effect that appears in systems where many particles come together. The lab searches for new quantum effects that differ from the Haldane conjecture.
MembersFaculty
The members of the Kato Lab consist of faculty members and doctoral and master's students.As of 2026
- ProfessorYusuke KatoPublications ↗
- Assistant ProfessorShuntaro Sumita
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: “Liquid helium Rollin film” I, AlfredLeitner, took this photograph as part of my movie "Liquid Helium,Superfluid" / Public domain (cropped)
- Superconductivity and Superfluidity: “Liquid helium superfluid phase” Alfred Leitner
（アップロード：Bmatulis） / Public domain (cropped) - Chiral Materials: “Quartz Crystal Cluster ( )” Stephanie Clifford from Arlington, VA, USA / CC BY 2.0 (cropped)
- Quantum Spin Systems: “Six states Bloch sphere” Kevin Garapo, Mhlambululi Mafu, Francesco Petruccione / CC BY-SA 4.0 (cropped)
- Related lab (栗原(貴之)研究室): “Femtosecond Laser and Pulse Compressor - Optics Lab - INRIM” Giorgio Brida from Torino, Italy / CC BY 2.0 (cropped)
- Related lab (堀田(知佐)研究室): “Магнитная доменная структура в пленке феррита-граната” Temiryazev / CC BY-SA 4.0 (cropped)
- Related lab (塩見(雄毅)研究室): “Magnetite-118736” Robert M. Lavinsky / CC BY-SA 3.0 (cropped)
- Related lab (非平衡理論研究室
（池田グループ） ): “Mayonnaise (1)” jules / CC BY 2.0 (cropped)
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