Individual Addressing of Trapped Ions

Trapped ions are a leading platform for quantum information processing with long coherence times and high fidelity and fast gates. To fully harness the power of the innate all-to-all connectivity in trapped ion systems, it is necessary to have single ion addressing. Here, we present a simple integrated photonics system with outputs directly imaged onto an ion chain with a high numerical aperture objective, enabling individual control over all the ions in a trap. This control will allow us to create arbitrary entangled states across an ion chain and explore protocols for sharing that entanglement between isolated modules in a larger quantum network.