Comment on "Quantum State Transfer Between Matter and Light"

Abstract

Matsukevich and Kuzmich (1) describe an interesting experiment directed toward the realization of scalable quantum networks through the protocol of (2). In particular, they demonstrate coherence between two atomic ensembles comprising two cylindrical volumes of cold rubidium atoms within a single magnetooptical trap. The authors claim that their measurements “constitute a complete set of tools required to build an arbitrary large-scale quantum network” and assert that this advance is achieved by way of several essential steps involving quantum entanglement.