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.

References in corpus (4)

• Conditional control of the quantum states of remote atomic memories for quantum networking
• Direct measurement of decoherence for entanglement between a photon and stored atomic excitation
• On experimental procedures for entanglement verification
• Efficient retrieval of a single excitation stored in an atomic ensemble

Cited by in corpus (5)

• The Quantum Internet
• Mapping photonic entanglement into and out of a quantum memory
• Heralded Entanglement between Atomic Ensembles: Preparation, Decoherence, and Scaling
• Efficient spatially-resolved multimode quantum memory
• Atomic-ensemble-based quantum memory for sideband modulations