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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Multidimensional quantum information based on single-photon temporal wavepackets.

Alex Hayat1, Xingxing Xing, Amir Feizpour

  • 1Centre for Quantum Information and Quantum Control, and Institute for Optical Sciences, Department of Physics, University of Toronto, 60 St. George Street, Toronto ON, M5S 1A7, Canada.

Optics Express
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PubMed
Summary
This summary is machine-generated.

We introduce a new quantum information encoding method using single photon temporal modulation. This technique allows for high-dimensional quantum communication with error rates below 1% over existing fiber optics.

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Area of Science:

  • Quantum Information Science
  • Quantum Communication
  • Photonics

Background:

  • Quantum information science leverages quantum properties for computation and communication.
  • High-dimensional quantum information encoding is crucial for enhancing communication capacity.
  • Existing fiber optic infrastructure presents challenges for advanced quantum communication protocols.

Purpose of the Study:

  • To propose a novel multidimensional quantum information encoding scheme.
  • To explore the use of temporal modulation of single photons for encoding.
  • To assess the feasibility and performance of this approach for practical quantum communication.

Main Methods:

  • Developing a quantum information encoding approach based on temporal modulation of single photons.
  • Defining a Hilbert space spanned by an infinite set of orthonormal temporal profiles.
  • Analyzing two specific temporal modulation schemes for practical implementation.

Main Results:

  • Demonstrated a multidimensional quantum information encoding method using temporal photon modulation.
  • Achieved error rates per symbol below 1% in practical implementation scenarios.
  • Showcased the potential for high-dimensional entanglement probing approaching the continuous limit.

Conclusions:

  • Temporal modulation of single photons offers a viable method for multidimensional quantum information encoding.
  • This approach can enable high-dimensional quantum communication over existing fiber optic networks.
  • The technique provides a pathway for exploring continuous variable-like high-dimensional entanglement.