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Integrated spatial multiplexing of heralded single-photon sources.

M J Collins1, C Xiong, I H Rey

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Spatial multiplexing enhances heralded single-photon yield by combining multiple silicon-based photon sources. This technique boosts single-photon output for quantum processors without increasing noise.

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Area of Science:

  • Quantum optics and photonics
  • Integrated photonics
  • Quantum information science

Background:

  • Non-deterministic photon sources limit single-photon quantum processors.
  • Spatial multiplexing can increase heralded single-photon yield without adding noise.

Purpose of the Study:

  • To overcome the statistical limits of individual photon sources.
  • To demonstrate a scalable method for enhancing heralded single-photon generation.

Main Methods:

  • Spatially multiplexing two monolithic silicon-based correlated photon pair sources operating in the telecommunications band.
  • Multiplexing photons from two waveguides pumped via an integrated coupler.

Main Results:

  • Achieved a 62.4% increase in heralded single-photon output from two sources without increased multipair generation.
  • Demonstrated a 63.1% increase in heralded photon rate using an integrated waveguide scheme, showing scalability.

Conclusions:

  • Spatial multiplexing of silicon-based photon sources offers a scalable architecture for quantum technologies.
  • This approach enables efficient two-photon interference crucial for optical quantum computing and communication.