  We describe rapid, random-access loading of a two-dimensional (2D)
surface-electrode ion-trap array based on two crossed photo-ionization laser
beams. With the use of a continuous flux of pre-cooled neutral atoms from a
remotely-located source, we achieve loading of a single ion per site while
maintaining long trap lifetimes and without disturbing the coherence of an ion
quantum bit in an adjacent site. This demonstration satisfies all major
criteria necessary for loading and reloading extensive 2D arrays, as will be
required for large-scale quantum information processing. Moreover, the already
high loading rate can be increased by loading ions in parallel with only a
concomitant increase in photo-ionization laser power and no need for additional
atomic flux.
