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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Published on: June 8, 2018

High-bandwidth hybrid quantum repeater.

W J Munro1, R Van Meter, Sebastien G R Louis

  • 1Hewlett-Packard Laboratories, Filton Road, Stoke Gifford, Bristol BS34 8QZ, United Kingdom.

Physical Review Letters
|September 4, 2008
PubMed
Summary
This summary is machine-generated.

This study introduces a novel quantum repeater design for creating entangled pairs, allowing dynamic control over noise and fidelity. Optimizing initial entanglement improves the rate of generating long-distance Bell pairs for quantum networks.

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Area of Science:

  • Quantum Information Science
  • Quantum Communication Networks
  • Quantum Repeater Technology

Background:

  • Quantum repeaters are essential for long-distance quantum communication.
  • Controlling noise and fidelity of entangled pairs is a key challenge.
  • Existing repeater architectures often lack homogeneity.

Purpose of the Study:

  • To present a physical- and link-level design for quantum repeater applications.
  • To enable controlled creation of entangled pairs with tunable noise levels.
  • To develop a homogeneous repeater architecture using shared physical resources.

Main Methods:

  • Designing a system for dynamic tuning of entangled pair fidelity and success probability.
  • Utilizing the same physical resources for entanglement generation, purification, and swapping.
  • Optimizing noise properties of initially distributed entangled pairs.

Main Results:

  • Achieved dynamic control, trading initial fidelity for success probability (e.g., F=0.98+ fidelity).
  • Demonstrated a homogeneous repeater architecture integrating entanglement generation and local gate operations.
  • Significantly improved the rate of generating long-distance Bell pairs through noise optimization.

Conclusions:

  • The proposed design offers a flexible approach to quantum repeater development.
  • Optimizing initial entangled pair properties is crucial for enhancing repeater performance.
  • The trade-offs between spatial and temporal resources impact overall system efficiency.