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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Single photon transport in two waveguides chirally coupled by a quantum emitter
Optics Express
|August 25, 2016
Summary
We demonstrate a quantum emitter acting as an ideal quantum router, perfectly redirecting single photons between two waveguides using chiral coupling. This routing is analyzed considering waveguide coupling and dissipation effects.
Area of Science:
- Quantum optics
- Solid-state physics
- Nanophotonics
Background:
- Single photon transport is crucial for quantum information processing.
- Controlling photon pathways is essential for building quantum networks.
- Quantum emitters coupled to photonic structures offer tunable light-matter interactions.
Purpose of the Study:
- To investigate single photon routing using a two-level quantum emitter coupled to two waveguides.
- To analyze the conditions for ideal quantum routing with chiral coupling.
- To evaluate the impact of cross-coupling and dissipation on routing efficiency.
Main Methods:
- Analytical derivation of scattering amplitudes for photon transport.
- Modeling of a two-level quantum emitter coupled to two waveguide modes.
- Numerical analysis of chiral coupling, waveguide cross-coupling, and dissipation.
Main Results:
- Achieved 100% single photon routing probability to the target waveguide under ideal chiral coupling conditions.
- Quantified the detrimental effects of waveguide cross-coupling on routing fidelity.
- Determined the influence of dissipation on the quantum router's performance.
Conclusions:
- A two-level quantum emitter can function as a highly efficient quantum router.
- Chiral coupling is key to achieving near-perfect single photon redirection.
- Deviations from ideal conditions, such as cross-coupling and dissipation, reduce routing efficiency.
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