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Updated: May 18, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Resource efficient source of multiphoton polarization entanglement.

E Megidish¹, T Shacham, A Halevy

¹Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem 91904, Israel.

Physical Review Letters

|September 26, 2012

Summary

Researchers developed a scalable quantum entanglement method using a single photon pair source. This technique generates multi-photon entanglement efficiently, overcoming previous resource limitations for practical applications.

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Area of Science:

Quantum optics
Quantum information science

Background:

Existing photon entanglement methods require resources that scale with photon number.
This limits the practical generation of multi-photon entangled states.

Purpose of the Study:

To present a novel, scalable approach for generating quantum entanglement between multiple photons.
To overcome the resource limitations of current photon entanglement schemes.

Main Methods:

Utilizes a single source of entangled photon pairs.
Employs time-slot multiplexing across two spatial modes instead of multiple spatial modes per photon.
Maintains the same experimental setup for generating states with varying numbers of photons.

Main Results:

Successfully generates quantum entanglement between a variable number of photons.
Demonstrates a scalable solution to the resource problem in multi-photon entanglement.
Enables the practical realization of larger entangled photon states.

Conclusions:

The proposed method offers a significant advancement in scalable multi-photon entanglement generation.
This approach overcomes previous scalability issues, making larger entangled states more accessible.
Paves the way for new possibilities in quantum information processing and quantum communication.