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Matsuo Lab
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The lab controls quantum physics using nanodevices made of superconductors and semiconductors.
AboutAbout the lab
Controlling quantum physics with nanodevices.
The Matsuo Lab conducts experiments in which it fabricates very small artificial structures (nanostructures) from superconductors and semiconductors, and creates and controls new quantum physics with them.
Focusing mainly on how electrons flow (transport phenomena), the lab investigates the quantum and statistical properties of electrons by precisely controlling devices.
Devices are fabricated by methods such as electron-beam lithography and measured after being cooled to extremely low temperatures in a dilution refrigerator.
The lab recruits undergraduate students doing graduation research and graduate students, and accepts lab visits at any time.
Key terms
- Dilution refrigerator
- A device that uses a mixture of two kinds of helium to cool down to just above absolute zero
- Josephson junction
- A structure in which two superconductors are bridged by a semiconductor or an insulator. It is a fundamental element of quantum computers
- Dirac electron
- An electron in materials such as graphene, in which the direction of motion is coupled to the direction of spin (or a spin-like property)
NewsLab news
Associate Professor Matsuo received the Honda Memorial Research Encouragement Award
A master's student received the Outstanding Student Presentation Award from the Physical Society of Japan
A master's student received a Student Presentation Award at the Workshop on Quantum Information with Semiconductors and Superconductors
Paper published on the superconducting diode effect in Andreev molecules (joint research)
The Matsuo Lab was founded
ResearchResearch themes
The lab precisely controls the charge, spin, and phase of electrons in nanoscale electronic devices, and works to establish the fundamentals of the quantum properties of electrons in artificial nanostructures. It also aims to create and control new quantum phenomena that may have potential applications in areas such as quantum information technology.
*Illustrative imageResearch on Andreev Molecules
When multiple Josephson junctions share a superconductor and become coupled, a special electronic state called an Andreev molecule forms. The lab aims to clarify its fundamentals and to develop technologies that lead to next-generation quantum computing, such as those using Majorana particles.
*Illustrative imagePhysics of Small Devices under Nonequilibrium Conditions
By applying voltage, high-frequency radiation, and phonons, the lab creates precisely controlled nonequilibrium environments inside nanodevices. Using quantum dots and other structures, it investigates the statistical physics of charge and spin, as well as quantum phenomena that appear only under nonequilibrium conditions.
*Illustrative imageDirac Electrons and Superconductivity
Electrons in graphene and topological insulators behave as Dirac electrons. Focusing in particular on junctions with superconductors, the lab aims to observe and understand the quantum transport phenomena expected for Dirac electrons.
MembersFaculty
The members of the Matsuo Lab consist of faculty, doctoral, master's, and undergraduate students, and RIKEN trainees.As of 2026
- Associate ProfessorSadashige MatsuoPublications ↗
- Assistant ProfessorShiki OgataPublications ↗
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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: “Dilution Refrigerator ( )” UCL Mathematical & Physical Sciences from London, UK / CC BY 2.0 (cropped)
- Research on Andreev Molecules: “Cross-Shaped Transmon with 2 Josephson Junctions” OJB Quantum / CC BY 4.0 (cropped)
- Physics of Small Devices under Nonequilibrium Conditions: “Chladni plate 18” Estes Objethos Atelier、Rodrigo Tetsuo Argenton / CC BY-SA 4.0 (cropped)
- Dirac Electrons and Superconductivity: “Graphen” AlexanderAlUS / CC BY-SA 3.0 (cropped)
- Related lab (蒲江研究室): “MoS2” Askar.syrlybekov / CC BY-SA 4.0 (cropped)
- Related lab (藤澤研究室): “Dilution Fridge 008 16K” OJB Quantum / CC BY 4.0 (cropped)
- Related lab (花井研究室): “A starling murmuration - geograph.org.uk - 6389346” Walter Baxter / CC BY-SA 2.0 (cropped)
- Related lab (佐藤研究室): “Femtosecond Laser and Pulse Compressor - Optics Lab - INRIM” Giorgio Brida from Torino, Italy / CC BY 2.0 (cropped)
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