Development of a quantum repeater

The goal of this project is to demonstrate a quantum repeater by entangling the quantum states of two individual nuclear spins separated by over 100 meters. This demonstration will require greatly enhancing the atom-light interaction. This will be achieved using very small, high quality crystalline whispering gallery optical resonators doped with rare-earth ions. This approach exploits the high Q of these resonators, the long quantum coherence times of the rare-earth ions and the fact that the ions can be held stationary in the region of the whispering gallery mode where the atom-light interaction is greatest. This project will provide a significant enabling technology for quantum information processing