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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

Robust distant entanglement generation using coherent multiphoton scattering.

Ching-Kit Chan¹, L J Sham¹

¹Department of Physics, Center for Advanced Nanoscience, University of California San Diego, La Jolla, California 92093-0319, USA.

Physical Review Letters

|August 29, 2014

Summary

This summary is machine-generated.

We developed a new method to entangle distant qubits using resonance fluorescence. This technique achieves high success and fidelity, showing robustness against photon fluctuations for quantum information processing.

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Area of Science:

Quantum Information Science
Atomic, Molecular, and Optical Physics

Background:

Entanglement is a key resource for quantum information processing.
Generating and maintaining entanglement between distant qubits is a significant challenge.

Purpose of the Study:

To present a novel protocol for entangling two qubits at a distance.
To leverage resonance fluorescence and multiphoton detection for robust entanglement generation.

Main Methods:

Utilizing resonance fluorescence from qubits.
Employing postselection on large and distinguishable fluorescence signals.
Analyzing the multiphoton nature of the fluorescence for entanglement fidelity.

Main Results:

Achieved high success probability and entanglement fidelity.
Demonstrated robustness of entanglement generation against photon fluctuations.
Showed entanglement duration within the decoherence time of qubit systems.

Conclusions:

The proposed protocol offers a viable method for distant qubit entanglement.
The technique is resilient to experimental noise, enhancing its practical applicability.
This work contributes to the development of scalable quantum networks.