Quantum gates and interfaces with atomic Rydberg interactions

Neutral atoms are one of the most promising approaches for scalable quantum information processing. Atomic qubits are all identical, have long coherence times, and can be entangled using long-range Rydberg interactions. I will present experiments showing the creation of entangled |W> states of ~10 atoms, and two-atom Bell states. These experiments, together with the ability to prepare, address, and measure arrays of single atoms provide a partial foundation for future neutral atom based quantum computing.

Truly scalable quantum processing will require further advances in several directions including longer coherence time, higher fidelity gate operations, and the ability to measure and reset individual atoms without crosstalk to other proximal qubits. Distributed quantum processing requires interfacing stationary matter qubits with photons for long range entanglement. Approaches and work in progress towards solving these challenges will be described.