I

Quantum Sensor
 ■ Optical TES
We focus on experimental dark matter search using Transition-Edge Sensors (TESs) that are sensitive to sub-eV signals.

 ■ TES Basic Development
The group is advancing TES characterization systems and applications across multiple fields.

 ■ Kamioka Dark Matter
The project searches for low-mass particle dark matter at the new underground Cryolab facility in Kamioka.

 ■ Solar Axion Search by TES
We are looking for new TES applications, such as for Solar Axion searches. We can design and fabricate TES microcalorimeters in the QUP and QUP satellite facility at ISAS.

 ■ QED test by TES
We apply TES detectors, covering from 1 to 200 keV, to test bound-state quantum electrodynamics (BSQED) in strong-field regimes by measuring X-rays from exotic atoms, like muonic atoms. This also aims to support nuclear physics through precise nuclear charge radius determination.

II

Quantum Device
 ■ Dark photon/Axion search with Penning Trap
This project uses a milli-Kelvin Penning trap to confine and cool a single electron, representing a magnetic-field-tolerant photon detector.

 ■ Dark photon/Axion search with qubit
This project develops and measures superconducting qubits for quantum sensing applications in dark matter searches.

 ■ Axion search with NV diamond
We focus on axion detection via precision magnetometry employing NV-diamond-based ODMR techniques.

 ■ Casimir Force
The group develops a Casimir force measurement system for new quantum field searches.

 ■ Gravitational Wave with SRF
We focus on designing and measuring high-frequency gravitational wave detectors with superconducting RF cavities.

 ■ Antimatter Gravity
We pursue high-precision manipulation of hydrogen atoms for measuring antimatter gravity using atomic fountain techniques. This involves developing atomic fountain systems and high-intensity, short-wavelength laser technologies.

III

Quantum Applications
 ■ Cryo ASIC
The group develops CMOS integrated circuits essential for future quantum bit control in quantum computers and dark matter searches.

 ■ Rad-hard device
We focus on developing and characterizing devices for extreme radiation environments, including new materials and detector configurations.

 ■ Hard X-ray and Gamma-ray imaging
This project develops a hard X-ray and gamma-ray imaging system using semiconductor detectors like Si, CdTe, and CZT, covering the entire development cycle from material design to system integration for a variety of applications, including particle physics, astrophysics, medical research, and non-destructive analysis.

IV

AI
 ■ AI
We focus on AI applications in technology fields such as radiation-hard devices, non-destructive element analysis, and medical imaging. An interdisciplinary approach beyond particle physics is also encouraged.

V

Theory
 ■ Theory
The Theory Group explores fundamental questions at the intersection of fields such as particle physics, cosmology, astrophysics, quantum metrology, and condensed matter, bridging theoretical insights with experimental frontiers and observations. We develop models of quantum fields, dark matter, early Universe dynamics, and advance a broad range of other topics, while also guiding novel observational strategies enabled by cutting-edge detectors and technologies.