9 papers
Automated Spin Readout Signal Analysis Using U-Net with Variable-Length Traces and Experimental Noise
Yui Muto, Motoya Shinozaki, Hideaki Yuta +5
Single-shot spin-state discrimination is essential for semiconductor spin qubits, but conventional threshold-based analysis of spin readout traces becomes unreliable under noisy co…
Perfect impedance matching unlocks sensitive radio-frequency reflectometry in 2D material quantum dots
Motoya Shinozaki, Akitomi Shirachi, Yuta Kera +7
Two-dimensional (2D) materials are attractive platforms for realizing high-performance quantum bits (qubits). However, radio-frequency (RF) charge detection, which is a key techniq…
Quantum dot transistors based on CVD-grown graphene nano islands
Takumi Seo, Motoya Shinozaki, Akiko Tada +8
Graphene nanoislands (GNIs) are one of the promising building blocks for quantum devices owing to their unique potential. However, direct electrical measurements of GNIs have been…
On-chip calibrated radio-frequency measurement at cryogenic temperatures for determination of SrTiO3-based capacitor properties
Akitomi Shirachi, Motoya Shinozaki, Yasuhide Tomioka +7
Quantum computing has emerged as a promising technology for next-generation information processing, utilizing semiconductor quantum dots as one of the candidates for quantum bits.…
Formation of multiple quantum dots in ZnO heterostructures
Koichi Baba, Kosuke Noro, Yusuke Kozuka +4
In recent years, advancements in semiconductor manufacturing technology have enabled the formation of high-quality, high-mobility two-dimensional electron gases in zinc oxide (ZnO)…
RFSoC-based radio-frequency reflectometry in gate-defined bilayer graphene quantum devices
Motoya Shinozaki, Tomoya Johmen, Aruto Hosaka +8
Quantum computers require both scalability and high performance for practical applications. While semiconductor quantum dots are promising candidates for quantum bits, the complexi…