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Entanglement swapping with local certification: application to remote micromechanical resonators.

M Abdi1, S Pirandola, P Tombesi

  • 1Department of Physics, Sharif University of Technology, Tehran, Iran.

Physical Review Letters
|October 23, 2012
PubMed
Summary

We developed a new entanglement swapping protocol using tripartite systems. This method allows for certified remote entanglement generation and verification through local measurements in continuous variable and optomechanical systems.

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Area of Science:

  • Quantum Information Science
  • Quantum Optics
  • Optomechanics

Background:

  • Entanglement swapping is crucial for quantum communication networks.
  • Current protocols often lack robust certification of generated entanglement.
  • Tripartite systems offer novel possibilities for quantum state manipulation.

Purpose of the Study:

  • To propose a novel entanglement swapping protocol utilizing tripartite systems.
  • To enable certified generation of remote entanglement.
  • To apply the protocol to continuous variable and optomechanical systems.

Main Methods:

  • Development of a protocol based on Bell measurements in tripartite systems.
  • Certification of remote entanglement via local measurements.

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  • Application and illustration using continuous variable (CV) systems and specific three-mode Gaussian states.
  • Extension to optomechanical systems involving micromechanical resonators.

    • Main Results:

    • Demonstration of a protocol for entanglement swapping involving tripartite systems.
    • Effective certification of remote entanglement generation through local measurements.
    • Successful application to CV systems and optomechanical setups.
    • Generation and certification of mechanical entanglement between remote micromechanical resonators.

    Conclusions:

    • The proposed protocol provides a certified method for remote entanglement generation.
    • The protocol is effective in both continuous variable and optomechanical systems.
    • Local measurements offer a practical way to verify entanglement in complex quantum systems.