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Yoneda Lab
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The lab works toward quantum computers by controlling electron spins in semiconductor quantum dots.
AboutAbout the lab
Semiconductors opening the future of quantum technology
The Yoneda Lab uses semiconductor quantum dots microfabricated at the nanoscale to study the quantum nature of electron spins in solids.
The lab uses techniques to precisely control and measure the spins of one to a few electrons confined in quantum dots.
It pursues the physics of quantum coherence and entanglement in solid-state electron systems, aiming for applications in quantum technologies such as silicon quantum computers.
The lab is a new one, established in October 2024.
Key terms
- Quantum dot
- A very small structure made in a semiconductor that can confine just one to a few electrons
- Electron spin
- A property of electrons that acts like a tiny magnet. Its up and down states are used to carry information
- Quantum coherence
- The property of a superposition state being maintained. It is lost over time due to noise from the surroundings
ResearchResearch themes
Advances in quantum control and microfabrication have made it possible to measure the spins of a small number of electrons in single shots and to control them freely in semiconductor nanodevices such as quantum dots. Building on these precise control and measurement techniques, the lab investigates the physics of quantum coherence and entanglement in solid-state electron systems and creates new functions for quantum devices.
*Illustrative imageHigh-Fidelity Electron Spin Control
The lab studies quantum control techniques for operating electron spin qubits in silicon quickly and accurately. It has reported methods such as fast electrical control of a single electron spin confined in a quantum dot.
*Illustrative imagePhysics of Coherence and Noise
The quantum coherence of electron spins is lost to environmental noise. To investigate this process, the lab is developing and refining methods to evaluate the coherence and environmental noise of silicon qubits.
*Illustrative imageExpanding the Capabilities of Quantum Computers
Building on precise control and measurement of electron spins, the lab has realized coherent transport, which moves electrons while preserving quantum information, and quantum non-demolition measurement, expanding the potential of silicon quantum devices.
MembersFaculty
The members of the Yoneda Lab consist of faculty, doctoral and master's students, researchers, and project specialists.As of 2026
- Associate ProfessorJun YonedaPublications ↗
- Assistant Professor渡邉 杜
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: “Dilution Fridge 009 8K” OJB Quantum / CC BY 4.0 (cropped)
- High-Fidelity Electron Spin Control: “Wafer 20110212” Sangitiana Fararano / CC BY-SA 2.0 (cropped)
- Physics of Coherence and Noise: “Sphere bloch” Taoufik AMRI / Public domain (cropped)
- Expanding the Capabilities of Quantum Computers: “DoubleQuantumDot” Vitaly Golovach / Public domain (cropped)
- Related lab (Yamamoto Lab): “Dilution Fridge with Quantum Processors Enclosed 008 8K” OJB Quantum / CC BY 4.0 (cropped)
- Related lab (Shimazaki Lab): “Monolayer TMDC structure” 3113Ian / CC BY-SA 3.0 (cropped)
- Related lab (Saitoh Lab): “Wiki-YIG” Krizu / CC BY-SA 3.0 (cropped)
- Related lab (Hasegawa Lab): “Printed flexible electronics ( )” Oak Ridge National Laboratory / CC BY 2.0 (cropped)
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