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 …

By applying a microwave drive to a specially designed Josephson circuit, we have realized
an elementary quantum optics model, the squeezed Kerr oscillator. This model displays, as …

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 …

Kerr nonlinear oscillators driven by a two-photon process are promising systems to encode
quantum information and to ensure a hardware-efficient scaling towards fault-tolerant …

We propose a scheme for realizing parity measurement of cat-state qubits based on a
topological quantum phase transition. The cat-state qubits, formed by the bosonic modes in …

A Kerr-nonlinear parametric oscillator (KPO) can generate a quantum superposition of two
oscillating states, known as a Schrödinger cat state, via quantum adiabatic evolution and …

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 …

The quantum simulation of dynamical gauge field theories offers the opportunity to study
complex high-energy physics with controllable low-energy devices. For quantum …

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

We present the experimental discovery of multiple simultaneous degeneracies in the
spectrum of a Kerr oscillator subjected to a squeezing drive. This squeezing, in combination …