A Resource Efficient Source of Multi-photon Polarization Entanglement

TL;DR

This paper introduces a resource-efficient method for generating multi-photon polarization entanglement using a single entangled photon pair source and time multiplexing, enabling scalable creation of large entangled states.

Contribution

It presents a novel approach that replaces multiple spatial modes with time slots, reducing resource requirements and improving scalability for multi-photon entanglement generation.

Findings

Enables generation of large entangled photon states with fewer resources.

Uses only a single entangled photon pair source and time multiplexing.

Facilitates practical realization of high-photon-number entangled states.

Abstract

Current photon entangling schemes require resources that grow with the photon number. We present a new approach that generates quantum entanglement between many photons, using only a single source of entangled photon pairs. The different spatial modes, one for each photon as required by other schemes, are replaced by different time slots of only two spatial modes. States of any number of photons are generated with the same setup, solving the scalability problem caused by the previous need for extra resources. Consequently, entangled photon states of larger numbers than before are practically realizable.