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Updated: May 16, 2025

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Compact source for quadripartite deterministically entangled optical fields.

Yanhong Liu1,2, Yaoyao Zhou1,2, Liang Wu3,4,5

  • 1Department of Physics, Taiyuan Normal University, Jinzhong 030619, China.

Fundamental Research
|April 1, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed a compact source for quadripartite entangled optical fields using a single nondegenerate optical parametric amplifier (NOPA). This method deterministically generates Greenberger-Horne-Zeilinger (GHZ) and linear cluster states for quantum networks.

Keywords:
Cluster stateCompact sourceGHZ stateQuadripartite entanglementSingle NOPA

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Area of Science:

  • Quantum Information Science
  • Quantum Optics
  • Quantum Networking

Background:

  • Entangled optical fields are fundamental to quantum networks.
  • Previous methods for quadripartite entanglement required multiple optical parametric amplifiers, posing challenges for compactness and efficiency.

Purpose of the Study:

  • To propose a compact and feasible scheme for deterministic quadripartite entanglement.
  • To enable practical applications of multi-user quantum networks.

Main Methods:

  • Utilized a single nondegenerate optical parametric amplifier (NOPA).
  • Coupled two-sided NOPA outputs on a beam splitter network.
  • Simulated to determine optimal experimental parameters.

Main Results:

  • Achieved deterministic generation of quadripartite entangled optical fields.
  • Successfully produced both Greenberger-Horne-Zeilinger (GHZ) and linear cluster states.
  • Identified optimal parameters for experimental implementation.

Conclusions:

  • The proposed scheme offers a compact and efficient source for quadripartite entanglement.
  • The generated GHZ and linear cluster states have potential applications in quantum secret sharing, controlled quantum teleportation, and quantum-entangled atomic ensembles.