Scheme for generating coherent state superpositions with realistic cross-Kerr nonlinearity

TL;DR

This paper proposes a practical method to generate superpositions of coherent states, known as cat states, using cross-phase modulation, and demonstrates its robustness against decoherence and experimental feasibility.

Contribution

It introduces a simple, decoherence-resistant scheme employing two identical cross-phase modulation processes to produce cat states.

Findings

The scheme effectively generates cat states with opposite phases.

It remains robust under photon absorption losses and other errors.

Experimental setup considerations are discussed.

Abstract

We present a simple scheme using two identical cross-phase modulation processes in decoherence environment to generate superpositions of two coherent states with the opposite phases, which are known as cat states. The scheme is shown to be robust against decoherence due to photon absorption losses and other errors, and the design of its experimental setup is also discussed.