223 citations · 1.6k across the 42 of their papers we have counts for
4 papers · 2 filters
Spectroscopic observation of the crossover from a classical Duffing oscillator to a Kerr parametric oscillator
T. Yamaji, S. Kagami, A. Yamaguchi +6
We study microwave response of a Josephson parametric oscillator consisting of a superconducting transmission-line resonator with an embedded dc-SQUID. The dc-SQUID allows to contr…
Effects of higher levels of qubits on control of qubit protected by a Josephson quantum filter
Shumpei Masuda, Kazuki Koshino
A Josephson quantum filter (JQF) protects a data qubit (DQ) from the radiative decay into transmission lines in superconducting quantum computing architectures. A transmon, which i…
Nonclassicality of open circuit QED systems in the deep-strong coupling regime
Tomohiro Shitara, Motoaki Bamba, Fumiki Yoshihara +4
We investigate theoretically how the ground state of a qubit-resonator system in the deep-strong coupling (DSC) regime is affected by the coupling to an environment. We employ as a…
Breaking the trade-off between fast control and long lifetime of a superconducting qubit
Shingo Kono, Kazuki Koshino, Dany Lachance-Quirion +4
The rapid development in designs and fabrication techniques of superconducting qubits has helped making coherence times of qubits longer. In the near future, however, the radiative…