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Updated: Jul 14, 2026
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Strongly correlated two-photon transport in a one-dimensional waveguide coupled to a two-level system
1Ginzton Laboratory, Stanford University, Stanford, California 94305, USA.
Physical Review Letters
|May 16, 2007
Summary
Two-photon transport in waveguides shows strong correlations. A novel two-photon bound state emerges, enabling photons to traverse a two-level system as a single entity, demonstrating tunable interactions.
Area of Science:
- Quantum optics
- Condensed matter physics
- Many-body physics
Background:
- Investigating quantum transport in low-dimensional systems is crucial for understanding light-matter interactions.
- Coupling waveguides to quantum systems reveals unique scattering phenomena.
Purpose of the Study:
- To analyze the correlated transport of two photons in a one-dimensional waveguide coupled to a two-level system.
- To explore the emergence of bound states and tunable photon-photon interactions.
Main Methods:
- Utilizing a generalized Bethe-ansatz technique to construct the exact S matrix.
- Analyzing scattering eigenstates within the coupled waveguide-two-level system.
Main Results:
- Demonstrated strong correlations in two-photon transport.
- Identified a two-photon bound state that propagates as a single composite particle.
- Showcased the two-level system's ability to induce attractive or repulsive photon-photon interactions.
Conclusions:
- The study reveals a novel mechanism for controlling photon transport and interactions via quantum systems.
- The developed methodology is applicable to other quantum models, such as the Anderson model.
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