Transforming squeezed light into a large amplitude coherent state superposition

TL;DR

This paper proposes an extended measurement strategy to generate high-fidelity large-amplitude coherent state superpositions from squeezed light, improving upon existing photon subtraction methods.

Contribution

It introduces a novel measurement approach enabling the creation of larger amplitude superpositions with higher fidelity than previous techniques.

Findings

Enhanced fidelity in superposition generation

Ability to produce larger amplitude coherent states

Improved measurement scheme efficiency

Abstract

A quantum superposition of two coherent states of light with small amplitude can be obtained by subtracting a photon from a squeezed vacuum state. In experiments this preparation can be made conditioned on the detection of a photon in the field from a squeezed light source. We propose and analyze an extended measurement strategy which allows generation of high fidelity coherent state superpositions with larger amplitude.