Preparation of Schr\"{o}dinger cat states of a cavity field via coupling to a superconducting charge qubit

TL;DR

This paper explores how nonlinear effects influence the creation of Schrödinger cat states in a cavity field coupled to a superconducting charge qubit, showing that nonlinearity can reduce the preparation time.

Contribution

It extends previous methods for generating superposition states by analyzing the impact of nonlinearity, demonstrating a faster state preparation process.

Findings

Nonlinear effects shorten the superposition creation time.

The approach builds on prior work with superconducting charge qubits.

Nonlinearity's main role is to accelerate state formation.

Abstract

We extend the approach of Ref. [Yu-xi Liu, L. F. Wei, and F. Nori, Europhys. Lett. 67, 941 (2004)] for preparing superposition states of a cavity field interacting with a superconducting charge qubit. We study effects of the nonlinearity on the creation of such states. We show that the main contribution of nonlinear effects is to shorten the time necessary to build the superposition.