activity
20242026
collaborators

6 papers

quant-ph2026

Realisation of a Protected Cat-Qutrit Manifold via Engineered Quantum Tunnelling

Sangil Kwon, Daisuke Hoshi, Toshiaki Nagase +8

Engineering quantum tunnelling in phase space has emerged as a viable method for creating a protected logical qubit manifold with biased-noise properties. A promising approach is t…

quant-ph2026

Ultralow-power coherent qubit control using AQFP logic at millikelvin temperatures

Hiroto Mukai, Akiyoshi Tomonaga, Rui Wang +5

Qubit controllers are essential for scaling superconducting quantum processors, but implementing them at the 10 mK stage of a dilution refrigerator remains challenging due to strin…

quant-ph2026

Control the qubit-qubit coupling with double superconducting resonators

Hui Wang, Rui Wang, Daichi Sugiyama +5

We experimentally studied the switching off processes in the double-resonator coupler superconducting quantum circuit. In both frequency and time-domain, we observed the variation…

quant-ph2025

On-chip Frequency divider in superconducting quantum circuit

Hui Wang, Chih-Yao Shih, Ching-Yeh Chen +3

Based on the physical process of two-atom simultaneous excitation by single photon, we proposed a frequency dividing scheme in superconducting quantum circuit. The frequency divisi…

quant-ph2025

Entangling Schrödinger's cat states by bridging discrete- and continuous-variable encoding

Daisuke Hoshi, Toshiaki Nagase, Sangil Kwon +9

In quantum information processing, two primary research directions have emerged: one based on discrete variables (DV) and the other on the structure of quantum states in a continuo…

quant-ph2024

Probing instantaneous quantum circuit refrigeration in the quantum regime

Shuji Nakamura, Teruaki Yoshioka, Sergei Lemziakov +8

Recent advancements in circuit quantum electrodynamics have enabled precise manipulation and detection of the single energy quantum in quantum systems. A quantum circuit refrigerat…