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Yamanashi Lab (Superconducting Quantum Integrated Electronics Lab)
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The lab creates next-generation computers with high computing power and power efficiency using superconducting circuits.
AboutAbout the lab
Building the ultimate computer with superconductivity
The Yamanashi Lab aims to build next-generation computing systems with far higher computing power and power efficiency than today's computers, using superconducting electronics as its main tool.
Its research fields are integrated electronics and quantum electronics, and the lab calls itself the "Superconducting Quantum Integrated Electronics Lab."
The lab studies information processing with new devices and circuits, and also conducts research aimed at applications to quantum computing systems and machine learning, so it is closely connected with the fields of physics and information science.
Its research covers a wide range of activities, including analysis, evaluation, optimization, design, and measurement.
Key terms
- Flux quantum
- The smallest unit of magnetic flux in a superconductor. In superconducting single flux quantum circuits, it is used as one bit of information.
- Stochastic computing
- A computing method that represents a value by the probability of 1s in a bit stream. Computation can be done with simple logic circuits; for example, multiplication takes just one AND gate.
- Adiabatic quantum-flux-parametron
- A type of superconducting circuit (AQFP). It is an ultra-low-power device that operates with power consumption 5 to 6 orders of magnitude lower than semiconductor circuits.
ResearchResearch themes
The Yamanashi Lab does research using superconducting electronics as its main tool, with the goal of next-generation computing systems with far higher computing power and power efficiency than today's computers. From ultra-low-power integrated circuits to arithmetic circuits for machine learning and artificial neural networks, it works on new information processing with superconducting circuits.
*Illustrative imageUltra-low-power superconducting integrated circuits
Superconducting single flux quantum circuits, which use flux quanta as bits, operate at very high speed with extremely low power consumption. The lab aims to break the trade-off between operating speed and low power consumption and to realize superconducting circuits that run at ultra-high speed with ultra-low power.
*Illustrative imageStochastic computing with superconducting circuits
This research realizes stochastic computing with fast superconducting circuits that generate physical random numbers from thermal noise. The lab has demonstrated the operation of a matrix multiplication circuit and is also advancing research on the conversion circuits and memory the system requires.
*Illustrative imageSuperconducting artificial neural networks
The lab studies superconducting circuits dedicated to artificial neural networks that represent information by the frequency of voltage pulses. It has designed a superconducting neuron and demonstrated high-speed operation at 40 GHz, and is now studying methods of data classification using this neuron.
*Illustrative imageAQFPs with switchable functions
The lab studies integrated circuits using adiabatic quantum-flux-parametrons (AQFPs). Aiming for a reconfigurable AQFP that can switch among multiple functions in a single circuit, it has demonstrated the operation of a circuit that switches between two basic functions.
MembersFaculty
- ProfessorYuki Yamanashi
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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: “Noiseless Amplifier ( )” National Institute of Standards and Technology / Public domain (cropped)
- Ultra-low-power superconducting integrated circuits: “Hero-64-pixel-array-superconducting-nanowire-single-photon-detector-b” NASA/JPL-Caltech; Text by Dr. Warren Holmes / Public domain (cropped)
- Stochastic computing with superconducting circuits: “Aurora 2ch mixer board arrived ( by c-g.)” c-g. / CC BY 2.0 (cropped)
- Superconducting artificial neural networks: “Neuromorphic Nanowire Network” DrHughManning / CC BY-SA 4.0 (cropped)
- AQFPs with switchable functions: “Wire Bonded Superconducting Quantum Chip with 6 Transmons 001” OJB Quantum / CC BY 4.0 (cropped)
- Related lab (Yoshikawa Lab (Integrated Electronics Lab)): “Superconducting Metamaterial Chip 004” OJB Quantum / CC BY 4.0 (cropped)
- Related lab (Nishiguchi Lab): “Quantum dots demonstration set” Physicsexperimentsorg / CC BY-SA 4.0 (cropped)
- Related lab (Arakawa Lab (Semiconductor Photonics Engineering Lab)): “Laser diode with case cut away” Arconsoli / CC BY-SA 4.0 (cropped)
- Related lab (Sekiguchi Lab (Spintronics Lab)): “Scanning tunneling microscope; Semiconductor; Spintronics ( )” National Institute of Standards and Technology / Public domain (cropped)
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