Linear optical scheme for producing polarization-entangled NOON states

TL;DR

This paper presents a linear optical method to generate polarization-entangled NOON states with higher success probability and resource efficiency, including practical schemes for N=4 states using current technology.

Contribution

It introduces a novel linear optical scheme for producing polarization-entangled NOON states and proposes feasible experimental implementations for N=4.

Findings

Higher success probability compared to previous methods

Resource-efficient scheme for polarization-entangled NOON states

Feasible experimental setups for N=4 states

Abstract

We propose a linear optical scheme that can conditionally generate high NOON states using polarization modes. This scheme provides advantages over the previous proposals on path-entangled NOON states in view of success probability or required resources of optical elements. We also investigate two experimental schemes feasible within existing technology that can produce the NOON-like or the NOON state for N = 4.