Quantum information processing with trapped ions
  Experiments directed towards the development of a quantum computer based on trapped atomic ions are described briefly. We discuss the implementation of single qubit operations and gates between qubits. A geometric phase gate between two ion qubits is described. Limitations of the trapped-ion method such as those caused by Stark shifts and spontaneous emission are addressed. Finally, we describe a strategy to realize a large-scale device. 
D. J. Wineland, M. Barrett, J. Britton, J. Chiaverini, B. DeMarco, W.   M. Itano, B. Jelenkovi'c, C. Langer, D. Leibfried, V...