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Fundamental Condensed Matter Engineering Lab
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A theory lab that explains quantum phenomena produced by large numbers of electrons and atoms.
AboutAbout the lab
Predicting new principles of the quantum world.
The Tanaka-Kawaguchi Lab studies, through theory, the properties of matter made up of large numbers of electrons and atoms.
In the quantum world, quantum statistics unlike anything in everyday life give rise to many phenomena, such as superconductivity and magnetism.
Focusing on topological quantum phenomena, from electrons in solids to ultracold atomic gases, the lab works to elucidate and predict new principles and functions.
The lab also actively collaborates with leading labs in Japan and abroad.
Key terms
- Superconductivity
- A phenomenon in which electrical resistance becomes zero below a certain temperature. It occurs when electrons form pairs
- Topological
- A viewpoint that focuses on properties that do not change when a shape is continuously deformed, such as the number of holes. It is also used to classify materials
- Bose-Einstein condensation
- A phenomenon in which, at extremely low temperatures, many particles gather in the same single quantum state. The group of particles behaves like a single wave
- Majorana fermion
- A particle that is its own antiparticle. It is expected to be applied to future quantum computers
NewsLab news
A student's paper published in Physical Review B
A paper selected as an Editor’s Suggestion in Physical Review Letters
A paper from the lab published in Physical Review Letters
A paper by Prof. Kawaguchi published in Science
A master's student received the Excellence Award at the master's thesis interim review
ResearchResearch themes
The lab studies systems made up of large numbers of electrons and atoms through theory, aiming to explain the frontiers of condensed matter physics. In addition to conventional topics such as superconductivity, magnetism, and Bose-Einstein condensation, it works on the new field of topological quantum physics.
*Illustrative imageSuperconducting junction systems
The lab studies systems in which a superconductor is joined to another material. Because the properties of devices that use superconductors depend greatly on the properties of the junction, the lab approaches this from the viewpoint of developing new quantum devices.
*Illustrative imageTopological materials
The lab studies materials classified by topology, such as topological insulators, topological superconductors, and Weyl semimetals. Majorana fermions, which appear at the edges of topological superconductors, are also a subject of its research.
*Illustrative imageTheory of ultracold atomic gases
The lab studies gases of atoms that are trapped with light or magnetic fields and cooled to extremely low temperatures, including Bose-Einstein condensation. Its work is wide-ranging, from numerical simulations to research closer to mathematical physics that uses topology and group theory.
*Illustrative imageMagnetic skyrmions
These are structures in magnetic materials in which many spins are arranged like a vortex and behave as a single particle as a whole. The lab studies how to control the interactions between skyrmions and how they move, and also focuses on the three-dimensional structure called a Hopfion.
MembersFaculty
The members of the Tanaka-Kawaguchi Lab are faculty members, a secretary, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorYukio Tanaka
- ProfessorYuki Kawaguchi
- Assistant ProfessorKeiji Yada
- Project Assistant ProfessorKoichiro Furutani
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: “Superconductor ring and magnet in levitation” Julien Bobroff (user:Jubobroff), Frederic Bouquet (user:Fbouquet), LPS, Orsay, France / CC BY-SA 3.0 (cropped)
- Superconducting junction systems: “Superconducting Metamaterial Chip 003” OJB Quantum / CC BY 4.0 (cropped)
- Topological materials: “Bismuth crystal macro” Dschwen / CC BY 2.5 (cropped)
- Theory of ultracold atomic gases: “Cloud of ultracold atoms levitated in a magneto-optical trap” Balping / CC BY-SA 4.0 (cropped)
- Magnetic skyrmions: “Neodimijski magneti, (Neodymium magnets)” Suradnik50 / CC BY-SA 3.0 (cropped)
- Related lab (電子機能材料研究グループ): “Example of a Close Space Sublimation setup” Ash Pera / CC BY-SA 4.0 (cropped)
- Related lab (低温物性工学研究グループ): “Levitating HTS BSCCO piece (Meissner effect) - 2” Winiar / CC BY-SA 3.0 (cropped)
- Related lab (レオロジー物理工学研究グループ): “Hand in a non-newtonian fluid 05” ElisaG87 / CC BY 4.0 (cropped)
- Related lab (磁性材料工学研究グループ): “Magnetite crystal structure (Fleet 1986, 633D) polyhedra model crystallographic standard alignmend” Ra'ike (Wikipedia) / CC0 (cropped)
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