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Deterministic All-Optical Continuous-Variable Quantum Telecloning.

Yanbo Lou1, Yinghui Lv1, Jiabin Wang1

  • 1State Key Laboratory of Precision Spectroscopy, Joint Institute of Advanced Science and Technology, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China.

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|May 3, 2024
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Summary
This summary is machine-generated.

This study introduces an all-optical quantum telecloning method, simplifying complex conversions for efficient quantum state copying. The new approach achieves high fidelity, paving the way for advanced quantum networks.

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Area of Science:

  • Quantum Information Science
  • Quantum Communication Protocols
  • Continuous-Variable Quantum Systems

Background:

  • Quantum telecloning enables copying quantum states across multiple locations using entanglement and classical communication.
  • Current continuous-variable telecloning relies on optic-electro and electro-optic conversions, limiting optical mode bandwidth.

Purpose of the Study:

  • To develop an all-optical continuous-variable quantum telecloning scheme.
  • To eliminate the need for optic-electro and electro-optic conversions in quantum telecloning.
  • To simplify the complexity of quantum telecloning implementation.

Main Methods:

  • Proposed an all-optical 1→2 continuous-variable quantum telecloning scheme.
  • Replaced optic-electro and electro-optic conversions with optical components, specifically beam splitters.
  • Experimentally demonstrated the scheme using coherent states.

Main Results:

  • Achieved successful all-optical 1→2 quantum telecloning of coherent states.
  • Attained fidelities of 58.6%±1.0% and 58.6%±1.1% for the two clones.
  • Exceeded classical limits for state reconstruction fidelity (51.9%±0.5% and 51.9%±0.6%).

Conclusions:

  • The all-optical scheme significantly simplifies quantum telecloning complexity.
  • Results provide a foundation for building flexible all-optical multiuser quantum networks.
  • Promotes advancements in all-optical quantum information processing.