Quantum computations with atoms in optical lattices: marker qubits and   molecular interactions
  We develop a scheme for quantum computation with neutral atoms, based on the concept of "marker" atoms, i.e., auxiliary atoms that can be efficiently transported in state-independent periodic external traps to operate quantum gates between physically distant qubits. This allows for relaxing a number of experimental constraints for quantum computation with neutral atoms in microscopic potential, including single-atom laser addressability. We discuss the advantages of this approach in a concrete physical scenario involving molecular interactions. 
T. Calarco, U. Dorner, P. Julienne, C. Williams, and P. Zoller