2026-02-12 オランダ・デルフト工科大学（TUDelft）
＜関連情報＞
- https://www.tudelft.nl/en/2026/tu-delft/rolling-out-the-carpet-for-spin-qubits-in-new-quantum-chip-architecture
- https://qutech.nl/2026/02/12/rolling-out-the-carpet-for-spin-qubits/
- https://www.nature.com/articles/s41928-026-01569-5
半導体スピン量子ビットのベンチマーク用クロスバーチップ A crossbar chip for benchmarking semiconductor spin qubits
Alberto Tosato,Asser Elsayed,Federico Poggiali,Lucas Erik Adriaan Stehouwer,Davide Costa,Karina Louise Hudson,Davide Degli Esposti & Giordano Scappucci
Nature Electronics Published:12 February 2026
DOI:https://doi.org/10.1038/s41928-026-01569-5
Abstract
The large-scale integration of semiconductor spin qubits into quantum processors will require the characterization of quantum components at scale. However, such characterization is challenging and typically requires radio-frequency measurements at millikelvin temperatures and the presence of magnetic fields. Here we report a scalable architecture for characterizing spin qubits using a quantum dot crossbar array. The approach, which we term as the qubit-array research platform for engineering and testing, uses a crossbar array comprising tightly pitched spin-qubit tiles and is implemented in planar germanium, with the potential to host 1,058 single-hole spin qubits. We measure a subset of 40 tiles and demonstrate key device functionality at millikelvin temperatures, including tile addressability, threshold voltage and charge noise statistics, as well as the characterization of hole spin qubits and their coherence times in a single tile.
