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Updated: Jun 8, 2026
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Quantum interference and entanglement induced by multiple scattering of light
J R Ott1, N A Mortensen, P Lodahl
1Department of Photonics Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark. jrot@fotonik.dtu.dk
Physical Review Letters
|September 28, 2010
Summary
Quantum interference in multiple-scattering media enhances photon correlations and entanglement. This quantum effect persists across disorder, offering new avenues for quantum information processing.
Area of Science:
- Quantum optics
- Condensed matter physics
- Quantum information science
Background:
- Quantum interference is a fundamental phenomenon in quantum mechanics.
- Multiple-scattering media can alter the propagation of light.
- Understanding quantum effects in complex media is crucial for quantum technologies.
Purpose of the Study:
- To investigate the impact of quantum interference on optical quantum states transmitted through multiple-scattering media.
- To analyze the effects on photon correlations and continuous variable entanglement.
- To explore the potential of multiple scattering for quantum information processing.
Main Methods:
- Theoretical analysis of quantum interference effects.
- Modeling the transmission of arbitrary numbers of optical quantum states.
- Calculating photon correlations and degree of continuous variable entanglement.
Main Results:
- Quantum interference significantly influences photon correlations, leading to photon antibunching.
- Continuous variable entanglement correlations are predicted within volume speckle patterns.
- Quantum interference effects were observed to survive averaging over disorder ensembles.
Conclusions:
- Multiple scattering can coherently interfere numerous independent quantum states of light.
- This phenomenon holds promise for advancements in quantum information processing.
- The study highlights the robustness of quantum interference in complex optical systems.
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