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Hashisaka Lab
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An experimental quantum transport lab that observes and manipulates quasiparticles carrying fractional charge.
AboutAbout the lab
Measuring and manipulating quantum many-body systems
The Hashisaka Lab uses precise electrical conductance measurement techniques and nanofabrication techniques to experimentally study quantum transport phenomena in materials.
A major theme is the observation and control of elementary excitations in quantum many-body systems, which arise from interactions between electrons.
The current focus is the observation and control of quasiparticles in fractional quantum Hall systems, which carry a charge smaller than that of a single electron.
The lab aims to establish new quantum technologies that cannot be realized with natural particles such as electrons or photons.
Key terms
- Quasiparticle
- The collective motion of a system of many electrons, treated as if it were a single particle
- Anyon statistics
- The rules governing how particles behave when they are exchanged, which differ from both Bose statistics and Fermi statistics
- Edge state
- A one-dimensional channel along the edge of a sample in a quantum Hall state, in which electrons flow in only one direction
NewsLab news
Paper accepted in Physical Review B
Became part of the Quantum Nano-Physics Research Center at the Institute for Solid State Physics
Paper accepted in Review of Scientific Instruments
Paper accepted in Physical Review Letters
Paper accepted in Nature Electronics
ResearchResearch themes
The lab experimentally studies quantum transport phenomena in materials using precise electrical conductance measurement and nanofabrication techniques. The current main theme is the observation and control of quasiparticles in fractional quantum Hall systems.
*Illustrative imageAnyon statistics of fractional quantum Hall quasiparticles
This research observes and controls phenomena arising from the fractional charge and anyon statistics of quasiparticles in fractional quantum Hall systems. By establishing methods to freely manipulate quasiparticle motion, the lab aims to demonstrate the braiding of anyons and topological qubits.
*Illustrative imageDynamics of quantum Hall edge states
Edge states in quantum Hall systems are one-dimensional electron systems in which electrons propagate in only one direction. The lab observes phenomena such as spin-charge separation, which arises from interactions among multiple edge states, to probe the internal electronic states of fractional quantum Hall systems.
*Illustrative imageNew phenomena and functions through original measurement techniques
The lab develops its own measurement and control techniques for quantum transport and carries out highly original experiments. Techniques designed with quantum Hall experiments in mind will be applied to a wide range of condensed matter research through collaborations.
MembersFaculty
The members of the Hashisaka Lab consist of faculty, project researchers, master's students, research trainees, technical and administrative assistants, and external fellows.As of 2026
- Associate ProfessorMasayuki HashisakaPublications ↗
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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 Fridge 008 16K” OJB Quantum / CC BY 4.0 (cropped)
- Anyon statistics of fractional quantum Hall quasiparticles: “Gallium Arsenide (GaAs) 2" wafer” La2O3 / CC BY-SA 3.0 (cropped)
- Dynamics of quantum Hall edge states: “Gold Cryostat 8K-3” Onri Jay Benally / CC BY-SA 2.0 (cropped)
- New phenomena and functions through original measurement techniques: “Lock-in amplifier-bis” Nuno Nogueira (Nmnogueira) / CC BY-SA 2.5 (cropped)
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