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Quantum Integrated Devices and Systems Lab
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A lab that uses superconductivity to aim for the world's fastest computer.
AboutAbout the lab
Toward realizing the world's “fastest” computer
The Quantum Integrated Devices and Systems Lab researches electronics based on superconductivity.
By actively using superconductivity, it is possible to build ultrahigh-speed, ultra-low-power circuits that cannot be achieved with semiconductors or conventional superconducting devices.
The lab aims to realize ultimate information processing circuits approaching thermal and quantum limits, and high-speed computers that work together with quantum computing.
The lab collaborates with research institutions in Japan and abroad and also hosts international workshops, so there are many opportunities to interact with researchers and students from overseas.
Key terms
- Superconductivity
- A phenomenon in which a material's electrical resistance drops to zero when it is cooled to a very low temperature.
- Single flux quantum
- The smallest unit of magnetic flux that can be trapped inside a superconducting loop. Its presence or absence is assigned to 0 and 1 for computation.
- Josephson junction
- A device in which two superconductors are joined with a very thin layer between them. It is a basic component for building superconducting circuits.
ResearchResearch themes
Using superconductivity, the lab builds ultrahigh-speed, ultra-low-power electronics that cannot be realized even with conventional semiconductors or superconducting devices. Using its integration process for magnetic Josephson junctions, which it was the first in the world to establish, the lab researches the foundational technologies for highly efficient, ultrahigh-speed supercomputers and for the world's fastest computers built in cooperation with quantum computing.
*Illustrative image100 GHz-class circuits operated by magnetic flux quanta
Single flux quantum (SFQ) circuits are digital circuits that compute by assigning the presence or absence of magnetic flux in a superconducting loop to 0 and 1. They operate at over 100 GHz, and their power consumption can be more than three orders of magnitude lower than that of semiconductors. In cooperation with other research institutions, the lab researches the world's fastest integrated circuits, including processors.
*Illustrative imageNew devices based on magnetic Josephson junctions
Using ferromagnets makes it possible to build superconducting elements whose wave function is shifted by π. With these, the lab studies ultrahigh-speed memory driven by pulse signals, ultra-energy-efficient computing operating near physical limits, and new quantum annealing for solving combinatorial optimization problems.
*Illustrative imageCryogenic circuits that support quantum computers
A full-scale quantum computer requires a mechanism for integrating and controlling many qubits. The lab researches ultra-low-power signal processing circuits that operate at an extremely low temperature of 20 mK.
MembersFaculty
The Quantum Integrated Devices and Systems Lab consists of faculty members, master's and undergraduate students, and secretaries.
- ProfessorMasamitsu Tanaka
- Assistant ProfessorLi Li
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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: “Superconducting Metamaterial Chip 003” OJB Quantum / CC BY 4.0 (cropped)
- 100 GHz-class circuits operated by magnetic flux quanta: “BICEP Telescope Camera Superconducting Circuit Chip ( )” National Institute of Standards and Technology / Public domain (cropped)
- New devices based on magnetic Josephson junctions: “Josephson junction real” No machine-readable author provided. Pasquale.Carelli assumed (based on copyright claims). / Public domain (cropped)
- Cryogenic circuits that support quantum computers: “IBM Quantum System One” OJB Quantum / CC BY 4.0 (cropped)
- Related lab (Information Networks Lab): “Optical fibre distribution cabinet Finland closeup” Antti Leppänen / CC BY 4.0 (cropped)
- Related lab (Computer Architecture Lab): “V11-wafer-dc328” Retro-Computing Society of Rhode Island / CC BY-SA 4.0 (cropped)
- Related lab (Space Information Processing Lab): “Anatomy of Earth's magnetosphere ESA518009” European Space Agency / CC BY-SA 3.0 igo (cropped)
- Related lab (Wireless Communication Systems Lab): “Heilbronn - Heilbronner Berge - Schweinsberg - Fernmeldeturm - Ansicht vom Schweinsbergturm (1)” Roman Eisele / CC BY-SA 4.0 (cropped)
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