Engineering the quantum states of light in a Kerr-nonlinear resonator by two-photon driving

TL;DR

This paper proposes a method to efficiently generate and manipulate cat states in a Kerr-nonlinear resonator using two-photon driving, enhancing robustness and enabling quantum logical gates for quantum information processing.

Contribution

It introduces a two-photon drive technique for preparing and controlling cat states in Kerr resonators, improving robustness and enabling universal quantum gates.

Findings

Robust cat state preparation against single-photon loss

Removal of phase evolution via tailored two-photon drive

Universal quantum gates on engineered eigenspace

Abstract

Cat states of the microwave field stored in high-Q resonators show great promise for robust encoding and manipulation of quantum information. Here we propose an approach to efficiently prepare such cat states in a Kerr-nonlinear resonator by the use of a two-photon drive. We show that this preparation is robust against single-photon loss. We moreover find that it is possible to remove undesirable phase evolution induced by a Kerr nonlinearity using a two-photon drive of appropriate amplitude and phase. Finally, we present a universal set of quantum logical gates that can be performed on the engineered eigenspace of the two-photon driven Kerr-nonlinear resonator.