Long-distance entanglement and quantum teleportation in coupled cavity arrays

Abstract

We introduce quantum spin models whose ground states allow for sizeable entanglement between distant spins. We discuss how spin models with global end-to-end entanglement realize quantum teleportation channels with optimal compromise between scalability and resilience to thermal decoherence, and can be implemented straightforwardly in suitably engineered arrays of coupled optical cavities.Comment: 4 pages, 5 figures. To appear in Phys. Rev. A (Rapid Communication