Laboratory
C2Lab
Affiliation
Kyushu University
Location
Fukuoka, Japan
C squared Lab, Cryogenic Computing Laboratory
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Cryogenic Computing Laboratory
Kyushu University

From devices to
full-stack cryogenic systems

We design, build, and evaluate energy-efficient computing systems that operate at cryogenic temperatures, spanning superconducting devices, architectures, EDA tools, and system integration.

Explore the research

Research areas

01

Superconducting Devices

Device and characterization research for reliable superconducting circuits at millikelvin temperatures.

View work
Scanning electron micrograph of a superconducting junction
Fig. 01Device micrograph

02

Cryogenic Computing Systems

Architectures and algorithms tailored for cryogenic environments, reducing energy, latency, and thermal load.

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Cryogenic computing chip mounted in a precision test package
Fig. 02Cryogenic test

03

EDA & Design Automation

Tools and methodologies for the design, verification, and optimization of superconducting computing systems.

View work
Integrated circuit physical design layout with multilevel routing
Fig. 03EDA layout

Lab initiatives

Events / Education

01

Conference series

QUEST

An international workshop series initiated and supported by C2Lab in collaboration with a broader organizing committee, connecting quantum information, cryogenic engineering, and superconducting computing.

Quantum, Cryogenic &
Superconductive Computing

Visit QUEST

02

Education

Computer Systems Foundations

A course companion for students outside computer science, building an accessible path from digital logic to complete computer systems.

Course site / CSF

Explore CSF

Latest publications

All publications
  1. 2025 IEICE Transactions on Electronics Design and Implementation of Energy-Efficient Majority-Logic-Based Approximate Adders Using Adiabatic Quantum-Flux-Parametron Technology Publication
  2. 2025 IEEE Transactions on Applied Superconductivity Electrostatic Gate-Tunable Josephson Junctions in JoSIM: Modeling, Simulation, and I--V Characterization Publication
  3. 2025 Proceedings of the 39th ACM International Conference on Supercomputing Graph Convolutional Network Acceleration Using Adiabatic Superconductor Josephson Devices Publication