TY - JOUR T1 - Scalable register initialization for quantum computing in an optical lattice JF - Journal of Physics B: Atomic, Molecular and Optical Physics Y1 - 2005 A1 - Gavin K. Brennen A1 - Guido Pupillo A1 - Ana Maria Rey A1 - Charles W. Clark A1 - Carl J. Williams AB - The Mott insulator state created by loading an atomic Bose-Einstein condensate (BEC) into an optical lattice may be used as a means to prepare a register of atomic qubits in a quantum computer. Such architecture requires a lattice commensurately filled with atoms, which corresponds to the insulator state only in the limit of zero inter-well tunneling. We show that a lattice with spatial inhomogeneity created by a quadratic magnetic trapping potential can be used to isolate a subspace in the center which is impervious to hole-hoping. Components of the wavefunction with more than one atom in any well can be projected out by selective measurement on a molecular photo-associative transition. Maintaining the molecular coupling induces a quantum Zeno effect that can sustain a commensurately filled register for the duration of a quantum computation. VL - 38 U4 - 1687 - 1694 UR - http://arxiv.org/abs/quant-ph/0312069v1 CP - 11 J1 - J. Phys. B: At. Mol. Opt. Phys. U5 - 10.1088/0953-4075/38/11/010 ER -