Towards experimental entanglement connection with atomic ensembles in the single excitation regime

Abstract

We present a protocol for performing entanglement connection between pairs of atomic ensembles in the single excitation regime. Two pairs are prepared in an asynchronous fashion and then connected via a Bell measurement. The resulting state of the two remaining ensembles is mapped to photonic modes and a reduced density matrix is then reconstructed. Our observations confirm for the first time the creation of coherence between atomic systems that never interacted, a first step towards entanglement connection, a critical requirement for quantum networking and long distance quantum communications.

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Cited by in corpus (13)

• The Quantum Internet
• Measurement-based quantum computation
• Mapping photonic entanglement into and out of a quantum memory
• Quantum Memories. A Review based on the European Integrated Project "Qubit Applications (QAP)"
• Heralded Entanglement between Atomic Ensembles: Preparation, Decoherence, and Scaling
• Entanglement of spin waves among four quantum memories
• Quantum repeaters with entangled coherent states
• Efficient reversible entanglement transfer between light and quantum memories
• Efficient spatially-resolved multimode quantum memory
• Witnessing single-photon entanglement with local homodyne measurements: analytical bounds and robustness to losses
• Quantum Repeaters based on Deterministic Storage of a Single Photon in distant Atomic Ensembles
• Atomic-ensemble-based quantum memory for sideband modulations
• A Hybrid Approach to Mitigate Errors in Linear Photonic Bell-State Measurement for Quantum Interconnects