Suitability of the approximate superposition of squeezed coherent states for various quantum protocols

TL;DR

This paper evaluates how well approximate superpositions of squeezed coherent states can perform in quantum protocols, focusing on their fidelity and practical utility based on recent experimental realizations.

Contribution

It introduces a method to assess the fidelity of approximate superpositions of squeezed coherent states for quantum protocols, highlighting their potential and limitations.

Findings

High-fidelity approximation achievable for certain protocols

Approximate states can effectively simulate ideal superpositions

Insights into the practical use of experimentally generated states

Abstract

A state in a d-dimensional Hilbert space can be simulated by a state defined in a different dimension with high fidelity. We assess how faithfully such the approximated state can perform quantum protocols, using an example of the squeezed coherent superposition state which was recently experimentally generated.