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quant-ph2025
High-fidelity all-microwave CZ gate with partial erasure-error detection via a transmon coupler
Shotaro Shirai, Shinichi Inoue, Shuhei Tamate +3
Entangling gates between neighboring physical qubits are essential for quantum error correction. Implementing them in an all-microwave manner simplifies signal routing and control…
quant-ph2025
Enhancing Intrinsic Quality Factors Approaching 10 Million in Superconducting Planar Resonators via Spiral Geometry
Yusuke Tominaga, Shotaro Shirai, Yuji Hishida +2
This study investigates the use of spiral geometry in superconducting resonators to achieve high intrinsic quality factors, crucial for applications in quantum computation and quan…
quant-ph2024
Superconducting surface trap chips for microwave-driven trapped ions
Yuta Tsuchimoto, Ippei Nakamura, Shotaro Shirai +1
Microwave-driven trapped ion logic gates offer a promising avenue for advancing beyond laser-based logic operations. In future microwave-based operations, however, the joule heat p…