# Quantum secret sharing with polarization-entangled photon pairs

## TL;DR

This paper presents a practical three-party quantum secret sharing protocol utilizing polarization-entangled photon pairs, which improves efficiency and robustness by eliminating the need for a third photon and enabling fast switching.

## Contribution

The authors introduce a novel quantum secret sharing protocol that uses a single entangled photon source for active participation and fast state switching, enhancing practicality over previous three-photon methods.

## Key findings

- The protocol is experimentally demonstrated with polarization-entangled photon pairs.
- It achieves higher efficiency by removing the need for a third photon.
- The source can switch states rapidly by modulating the pump beam.

## Abstract

We describe and experimentally demonstrate a three-party quantum secret sharing protocol using polarization-entangled photon pairs. The source itself serves as an active participant and can switch between the required photon states by modulating the pump beam only, thereby making the protocol less susceptible to loss and amenable to fast switching. Compared to three-photon protocols, the practical efficiency is dramatically improved as there is no need to generate, transmit, or detect a third photon.