By applying a microwave drive to a specially designed Josephson circuit, we have realized
a double-well model system: a Kerr oscillator submitted to a squeezing force. We have …

We propose a protocol to realize nonadiabatic geometric quantum computation of small-
amplitude Schrödinger cat qubits via invariant-based reverse engineering. We consider a …

Quantum tunneling is the phenomenon that makes superconducting circuits “quantum”.
Recently, there has been a renewed interest in using quantum tunneling in phase space of a …

We propose a theoretical protocol to implement multiqubit geometric gates (ie, the Mølmer-
Sørensen gate) using photonic cat-state qubits. These cat-state qubits stored in high-Q …

A Kerr nonlinear parametric oscillator (KPO) can stabilize a quantum superposition of two
coherent states with opposite phases, which can be used as a qubit. In a universal gate set …

Kerr cat qubits are a promising candidate for fault-tolerant quantum computers owing to the
biased nature of their errors. The ZZ coupling between the qubits can be utilized for a two …

Autonomous quantum error correction has gained considerable attention to avoid
complicated measurements and feedback. Despite its simplicity compared with the …

A Kerr nonlinear parametric oscillator (KPO) is one of the promising devices used to realize
qubits for universal quantum computing. The KPO can stabilize two coherent states with …

Kerr parametric oscillators (KPOs), which can be implemented with superconducting
parametrons possessing large Kerr nonlinearity, have been attracting much attention in …

Kerr parametric oscillators (KPOs) have attracted increasing attention in terms of their
application to quantum information processing and quantum simulations. The state …