Schemes for generating W state of paths and W state of polarization photons

TL;DR

This paper presents simple, feasible schemes using commercial multiport fiber couplers and single photon sources to generate two types of W states: path W states with one photon and polarization W states with multiple photons.

Contribution

The paper introduces practical schemes for generating path and polarization W states using readily available technology, simplifying previous methods.

Findings

Schemes are feasible with current technology.

Uses common multiport fiber couplers and single photon sources.

Enables generation of both path and polarization W states.

Abstract

In this paper, we give two very simple schemes to produce two kinds of W states, one kind is path W state with one photon and the other is multiphoton photon polarization W state. These schemes just need a common commercial multiport fiber coupler and single photon sources, they are feasible by current technologies.