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Quantum interference in heterogeneous superconducting-photonic circuits on a silicon chip
1Department of Electrical Engineering, Yale University, New Haven, Connecticut 06511, USA.
Nature Communications
|January 22, 2016
Summary
Researchers developed a hybrid superconducting-photonic circuit for scalable quantum information processing. This integrated system demonstrates high-visibility photon interference and detection on a silicon chip, advancing quantum optics.
Area of Science:
- Quantum Information Science
- Integrated Photonics
- Superconducting Devices
Background:
- Scaling quantum information processors is crucial for disruptive quantum technology.
- Current photonic approaches face challenges in large-scale implementation.
- Quantum interference and single-photon detection are key components.
Purpose of the Study:
- To develop a scalable hybrid superconducting-photonic circuit system.
- To demonstrate the integration of quantum interference and detection on a silicon chip.
- To advance integrated quantum optics.
Main Methods:
- Developed a hybrid superconducting-photonic circuit on a silicon chip.
- Utilized silicon nitride nanophotonic waveguides and a directional coupler.
- Integrated waveguide-coupled superconducting single-photon detectors.
Main Results:
- Achieved 97% interference visibility for photon pairs.
- Demonstrated successful interference and detection directly on the chip.
- Fabrication processes are compatible with standard semiconductor technology.
Conclusions:
- The hybrid approach enables scalable quantum photonic circuits on silicon.
- This integration is suitable for advanced quantum information processing.
- Facilitates the development of more complex, larger-scale quantum photonic systems.
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