Home › Cell Biology › A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Cell Biology JoVE (Open Access) Citable · DOI

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

DOI: 10.3791/59705-v
What you'll learn
  • ✓ Design and assemble an interferometric optical system for entangled photon generation
  • ✓ Measure coincidence counts to validate quantum entanglement fidelity
  • ✓ Interpret polarization-entangled photon characterization data and results
Protocol

We describe an optical system for the generation of unconditional polarization-entangled photons based on multiple quantum interference effects with a detection scheme to estimate the experimental fidelity of generated entangled photons.

Difficulty
advanced
Total time
~4–8 hours (system alignment and stabilization; measurement acquisition dependent on coincidence statistics)

Steps

1
Align interferometric system for quantum interference

Set up the optical interferometer architecture using multiple quantum interference effects to generate unconditional polarization-entangled photons. This includes beam path alignment, optical component placement, and laser pump configuration.

▶ 00:42
2
Measure coincidence counts via detection scheme

Perform photon detection and coincidence counting measurements to quantify entanglement generation. Align detectors and acquire coincidence data to estimate experimental fidelity of entangled photon pairs.

▶ 04:30
3
Characterize and validate entangled photon generation

Analyze measured data to confirm generation of unconditional polarization-entangled photons and calculate fidelity metrics. Compare results against theoretical predictions for quantum interference.

▶ 05:46
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