ISKR LogoIshikuro Laboratory
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Research

Research Topics

Bridging the physical and the cyber world. Using advanced semiconductor integrated circuit technology, we build ultra-low-power interfaces that read faint signals with high precision. CMOS circuit design is the core of our work: together with research institutions in Japan and abroad, we combine heterogeneous chip integration with superconducting devices, sensors, MEMS and photonics to realise compact, high-performance, low-power interfaces.

Three research projects

Concept illustration showing, from left to right, a generic quantum-system schematic, a Cryo-CMOS interface and classical signal processing

Quantum–Classical Interface

Cryogenic CMOS circuits (Cryo-CMOS)

Supporting quantum computers

We study LSIs that operate at liquid-helium temperature (4.2 K) and read out the minute signals of qubits, working towards an interface between quantum and classical technology.

Quantum–Classical Interface
FIG. 1Quantum–Classical Interface

Concept guide: connecting quantum and classical systems

Cryo-CMOS circuits handle control and readout signals between classical electronics and a quantum device. Control signals travel towards the quantum device; readout signals return to the classical electronics.

  1. Quantum device

    Signal exchange with qubits

    Readout → / ← Control

  2. Cryo-CMOS interface

    Control and readout circuits operating at cryogenic temperatures

    Readout → / ← Control

  3. Classical electronics

    Control commands and readout processing

Simplified functional concept; it does not specify a temperature layout or equipment installed in the laboratory.

Quantum · Cryogenic · CMOS

JST Moonshot Program / JST ASPIRE Program