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Quantum Zeno repeaters.

Veysel Bayrakci1, Fatih Ozaydin2,3,4

  • 1Faculty of Engineering and Natural Sciences, Isik University, 34980, Sile, Istanbul, Türkiye. bayrakciveysel07@gmail.com.

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This study introduces a quantum repeater protocol using the quantum Zeno effect (QZE) for high-fidelity entanglement swapping. This method bypasses complex quantum gates, simplifying quantum communication networks.

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Area of Science:

  • Quantum Information Science
  • Quantum Communication

Background:

  • Quantum repeaters are essential for long-distance quantum communication and the quantum internet.
  • Entanglement swapping, a key component of quantum repeaters, typically requires complex controlled quantum gates.
  • The quantum Zeno effect (QZE) influences quantum system dynamics through frequent measurements.

Purpose of the Study:

  • To propose a novel entanglement swapping protocol for quantum repeaters utilizing the quantum Zeno effect.
  • To reduce the complexity of quantum repeater implementation by avoiding controlled quantum gates.

Main Methods:

  • Development of an entanglement swapping protocol based on the quantum Zeno effect.
  • Inclusion of simple frequent threshold measurements and single-particle rotations.
  • Extension of the protocol to a series of repeater stations for quantum Zeno repeaters.

Main Results:

  • The proposed entanglement swapping protocol achieves nearly unit fidelity.
  • Quantum Zeno repeaters constructed using this protocol also demonstrate nearly unit fidelity, irrespective of the number of repeater stations.
  • The protocol successfully avoids the need for controlled quantum gates, significantly reducing circuit complexity.

Conclusions:

  • The quantum Zeno effect offers a viable method for high-fidelity entanglement swapping in quantum repeaters.
  • This approach simplifies the construction of quantum repeaters, paving the way for more accessible quantum networks.
  • The findings have significant implications for advancing long-distance quantum communication and quantum computing.