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Solid State Physics Lab
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The lab uses theory to explain vibrations and electrons in solids.
AboutAbout the lab
Reading the properties of matter through symmetry and topology
The Solid State Physics Lab studies phenomena occurring in matter from a theoretical standpoint.
In addition to long-standing topics in condensed matter physics such as phonons, disordered systems, and topological phases, the lab also deals with newer topics such as non-Hermitian systems and quantum walks.
The symmetries and topological phases of physical systems play major roles in a wide range of systems, including phonon, electron, and photon systems.
The lab goes beyond theory and also puts effort into proposing experiments to verify the phenomena it predicts.
Key terms
- Phonon
- The collective vibration of atoms in a crystal, treated as a single particle
- Topological phase
- A state determined by how the whole system is connected. It is robust against impurities and defects
- Quantum walk
- A quantum version of the random walk, in which a particle moves at fixed time steps
NewsLab news
The lab held an information session
An undergraduate student received the FY2025 Dean's Award of the Faculty of Engineering
A master's student received a Poster Award at the international symposium POS-RST
A paper showing the origin of topological phases in stacked systems was published in Phys. Rev. B
A paper proposing a quantum version of active particles using quantum walks was published in Scientific Reports
ResearchResearch themes
The lab investigates phenomena in matter from a theoretical standpoint. In addition to phonons, disordered systems, and topological phases, it works broadly on newer topics such as non-Hermitian systems and quantum walks.
*Illustrative imagePhonons (lattice vibrations)
The lab theoretically studies the vibrations of atoms in crystals (phonons). Phonons in phononic crystals and in nanoscale structures are also subjects of research.
*Illustrative imagePhysics of disordered systems
As disorder such as impurities and defects increases in a material, universal critical phenomena that do not depend on microscopic details appear. The lab studies the mechanism behind this.
*Illustrative imageTopological phases
Surface states that arise from a global property of the system (its topology) are robust even in the presence of disorder. The lab studies such phases.
*Illustrative imageQuantum walks
The lab deals with quantum motion in which the state changes at discrete time steps. With applications to quantum computation and quantum information in view, it also makes proposals for experimental verification.
MembersFaculty
The members of the Solid State Physics Lab consist of faculty, research fellows, doctoral, master's, and undergraduate students, and secretaries.As of 2026
- ProfessorHideaki Obuse
- Project LecturerSeiji Mizuno
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: “WF111-Anderson transition-multifractal” RudoRoemer / CC BY-SA 3.0 (cropped)
- Phonons (lattice vibrations): “Potassium-graphite-xtal-3D-sticks-A” Ben Mills / Public domain (cropped)
- Physics of disordered systems: “Speckle pattern” Braice / Public domain (cropped)
- Topological phases: “Algebraic surfaces” Ashton Bradley Aspir8 / CC BY-SA 4.0 (cropped)
- Quantum walks: “Tabuleiros de Galton (antes e depois)” Estes Objethos Atelier、Rodrigo Tetsuo Argenton / CC BY-SA 4.0 (cropped)
- Related lab (Quantum Functional Engineering Lab): “Optical Therapeutics and Medical Nanophotonics Laboratory ( )” The U.S. Food and Drug Administration / Public domain (cropped)
- Related lab (Mathematical Physics Engineering Lab): “Meissner effect p1390048” Mai-Linh Doan / CC BY-SA 3.0 (cropped)
- Related lab (Condensed Matter Physics Engineering Lab): “CdTe quantum dots” Ruslan.Ka / CC BY 4.0 (cropped)
- Related lab (Topology Science and Engineering Lab): “Möbius strip” David Benbennick / CC BY-SA 3.0 (cropped)
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