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Updated: Jun 26, 2026

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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Perfect linear optics using silicon photonics.

Miltiadis Moralis-Pegios1, George Giamougiannis2, Apostolos Tsakyridis2

  • 1Department of Informatics, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece. mmoralis@csd.auth.gr.

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|June 27, 2024
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Summary
This summary is machine-generated.

Silicon photonics (SiPho) enables high-speed computing. This study demonstrates a 4x4 coherent crossbar chip achieving 99.997% fidelity for 10,000 linear transformations, overcoming fabrication challenges.

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Area of Science:

  • Integrated photonics
  • Neuromorphic computing
  • Quantum computing

Background:

  • Silicon photonics (SiPho) offers high-speed and energy-efficient computation.
  • Mapping matrices to optical architectures is challenging due to fabrication imperfections and insertion losses.
  • Existing optical architectures suffer from reduced fidelity with increasing matrix dimensions or losses.

Purpose of the Study:

  • To experimentally deploy and validate a 4x4 coherent crossbar (Xbar) on a silicon chip.
  • To demonstrate the fidelity restoration capabilities of the optical matrix.
  • To highlight silicon photonics' potential for complex computations.

Main Methods:

  • Experimental implementation of a 4x4 coherent crossbar (Xbar) integrated optical circuit.
  • Validation of theoretically predicted fidelity restoration.
  • Demonstration of 10,000 arbitrary linear transformations.

Main Results:

  • Achieved a record-high fidelity of 99.997% ± 0.002 for arbitrary linear transformations.
  • Demonstrated near-unity and loss-independent fidelity.
  • Measurement equipment was the primary limitation to fidelity.

Conclusions:

  • The integrated optical circuit provides high fidelity for arbitrary matrix realization.
  • Silicon photonics offers a promising platform for complex computations, overcoming previous limitations.
  • This work validates the potential of light for advanced computing applications.