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Related Experiment Video

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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

A monolithically integrated polarization entangled photon pair source on a silicon chip.

Nobuyuki Matsuda1, Hanna Le Jeannic, Hiroshi Fukuda

  • 1NTT Basic Research Laboratories, NTT Corporation, Atsugi, Kanagawa, Japan. m.nobuyuki@lab.ntt.co.jp

Scientific Reports
|November 15, 2012
PubMed
Summary

Researchers developed the first integrated polarization-entangled photon pair source on a chip. This silicon photonic circuit achieves high fidelity, paving the way for scalable quantum information systems.

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Area of Science:

  • Quantum Information Science
  • Integrated Photonics
  • Quantum Optics

Background:

  • Integrated photonic circuits are crucial for scalable quantum information systems due to their size and stability.
  • Developing on-chip components for generating, manipulating, and measuring polarization-encoded quantum states is essential.
  • Photon pair generation is a critical component for quantum information processing.

Purpose of the Study:

  • To demonstrate the first integrated source of polarization-entangled photon pairs on a chip.
  • To implement a stable and efficient silicon-on-insulator photonic circuit for quantum state generation.
  • To provide a versatile platform for future on-chip quantum information systems.

Main Methods:

  • Fabrication of a silicon-on-insulator photonic circuit.
  • Generation of polarization-entangled photon pairs using the integrated source.
  • Characterization of the entangled state fidelity.

Main Results:

  • Successful implementation of the first integrated polarization-entangled photon pair source.
  • Achieved an entangled state fidelity of 91 ± 2%.
  • The source features versatile interfaces for integration with other waveguide platforms.

Conclusions:

  • The developed integrated source is a significant step towards full-scale photonic quantum information systems on a chip.
  • The high fidelity and versatility of the source enable advanced quantum information protocols.
  • This work lays the foundation for miniaturized and robust quantum technologies.