Neutral Atom Quantum Computer with On-Demand Interaction

We discuss an implementation of a neutral atom quantum computer, where atoms are trapped in an array of near-field Fresnel light. The trap light is supplied through an optical fiber attached to each trap. Single-qubit gate operation is realized by the two-photon Raman transition, which is controlled by another laser beam through the same fiber. Selective 2-qubit gate operation is implemented by leaving two atoms in a 1-dimensional optical lattice and then colliding a particular set of quantum states of these atoms to obtain an extra phase. We believe the proposed scheme is realizable within current technology.