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Quantum Communication between Multiplexed Atomic Quantum Memories.

C Li1, N Jiang1, Y-K Wu1

  • 1Center for Quantum Information, IIIS, Tsinghua University, Beijing 100084, People's Republic of China.

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This summary is machine-generated.

Multiplexed atomic quantum memories (MAQM) enable efficient entanglement for quantum networks. This study demonstrates the integrated generation, storage, and transfer of quantum entanglement between MAQM systems.

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Area of Science:

  • Quantum Information Science
  • Atomic Physics
  • Quantum Networking

Background:

  • Previous experiments demonstrated individual quantum network operations like entanglement generation, storage, and transmission separately.
  • Multiplexed atomic quantum memories (MAQM) offer enhanced efficiency for establishing entanglement in quantum networks.

Purpose of the Study:

  • To demonstrate the compatibility and integration of basic quantum network operations using MAQM.
  • To show the transfer of quantum information, including higher-dimensional states, between distant MAQM systems.

Main Methods:

  • Generating photon-atom entanglement from selected memory cells within a 6x5 MAQM.
  • Converting spin-wave excitations to time-bin photonic excitations with controllable storage times.
  • Storing and retrieving photons in a second MAQM, also with controllable storage, and measuring state fidelity.

Main Results:

  • Successful integration and compatibility of entanglement generation, storage, and transfer operations were demonstrated.
  • Quantum information preservation throughout the process was verified by state fidelity measurements.
  • Transfer of higher-dimension quantum states between two distant MAQM systems was achieved.

Conclusions:

  • The experiment confirms the feasibility of integrated quantum network operations using MAQM.
  • MAQM systems are capable of preserving and transferring quantum information, including complex states, over distances.
  • This work represents a significant step towards building robust and efficient quantum networks.