4 papers
Four-body interactions in Kerr parametric oscillator circuits
Yohei Kawakami, Tomohiro Yamaji, Aiko Yamaguchi +9
We theoretically present new unit circuits of Kerr parametric oscillators (KPOs) with four-body interactions, which enable the scalable embedding of all-to-all connected logical Is…
High-speed gates in Kerr-cat qubits via fast-forward scaling
Takaaki Aoki, Shumpei Masuda
Kerr parametric oscillators can encode Kerr-cat qubits, whose biased-noise nature can reduce the hardware overhead required for fault-tolerant quantum computation. In a recently pr…
Residual--coupling suppression and fast two-qubit gate for Kerr-cat qubits based on level-degeneracy engineering
Takaaki Aoki, Akiyoshi Tomonaga, Kosuke Mizuno +1
Building large-scale quantum computers requires an interqubit-coupling scheme with a high on-off ratio to avoid unwanted crosstalk coming from residual coupling and to enable fast…
Stabilization of Kerr-cat qubits with quantum circuit refrigerator
Shumpei Masuda, Shunsuke Kamimura, Tsuyoshi Yamamoto +2
A periodically-driven superconducting nonlinear resonator can implement a Kerr-cat qubit, which provides a promising route to a quantum computer with a long lifetime. However, the…