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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
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Polariton Exchange Interactions in Multichannel Optical Networks
Mohammadsadegh Khazali1, Callum R Murray1, Thomas Pohl1
1Department of Physics and Astronomy, Aarhus University, Aarhus 8000, Denmark.
Physical Review Letters
|October 2, 2019
Summary
We demonstrate a novel photonic network using Rydberg polaritons and dipolar interactions. This network enables efficient photon hopping for robust two-photon quantum gates, expanding nonlinear optics capabilities.
Area of Science:
- Quantum optics
- Condensed matter physics
- Nanophotonics
Background:
- Rydberg polaritons offer unique light-matter interaction properties.
- Dipolar interactions in Rydberg states mediate effective photon exchange.
- Controlling photon propagation in multiple spatial modes is crucial for quantum networks.
Purpose of the Study:
- To investigate the dynamics of Rydberg polaritons with dipolar interactions in multi-mode propagation.
- To design a photonic network for quantum information processing.
- To explore the potential of Rydberg electromagnetically induced transparency in multidimensional geometries.
Main Methods:
- Theoretical analysis of excitation exchange between Rydberg states.
- Modeling of photon hopping across different spatial channels.
- Design and simulation of a photonic network for quantum gate implementation.
Main Results:
- Dipolar excitation exchange enables efficient photon hopping between spatial channels.
- Photon exchange efficiency increases with channel distance, optimal at finite rail separation.
- A robust two-photon quantum gate with a π phase is realized.
Conclusions:
- The developed mechanism expands Rydberg electromagnetically induced transparency to multidimensional geometries.
- The photonic network offers a platform for nonlinear optical networks.
- This work paves the way for explorations in photonic many-body physics.
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