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Updated: Apr 10, 2026

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Highly retrievable spin-wave-photon entanglement source.

Sheng-Jun Yang1,2, Xu-Jie Wang1,2, Jun Li1,2

  • 1Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.

Physical Review Letters
|June 13, 2015
PubMed
Summary
This summary is machine-generated.

We developed a new quantum entanglement source with high retrieval efficiency, crucial for building quantum repeaters and networks. This breakthrough overcomes limitations of previous sources, paving the way for larger-scale quantum applications.

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Area of Science:

  • Quantum Information Science
  • Atomic Physics
  • Quantum Optics

Background:

  • Quantum repeaters and networks rely on entanglement between single photons and quantum memories.
  • Existing entanglement sources suffer from low retrieval efficiency, hindering scalability.

Purpose of the Study:

  • To develop a highly retrievable spin-wave-photon entanglement source.
  • To overcome the limitations of low retrieval efficiency in quantum entanglement generation.

Main Methods:

  • Created polarization entanglement via interaction of single photons with atoms in a low-finesse ring cavity.
  • Engineered the cavity for dual spin-wave mode resonance to enhance retrieval efficiency.

Main Results:

  • Achieved an intrinsic retrieval efficiency of up to 76(4)%.
  • Demonstrated a highly retrievable spin-wave-photon entanglement source.

Conclusions:

  • The developed entanglement source is highly efficient for retrieving spin-wave qubits.
  • This advancement is vital for future large-scale quantum repeater and quantum network applications.