Scalable register initialization for quantum computing in an optical lattice

TitleScalable register initialization for quantum computing in an optical lattice
Publication TypeJournal Article
Year of Publication2005
AuthorsBrennen, GK, Pupillo, G, Rey, AMaria, Clark, CW, Williams, CJ
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Pages1687 - 1694
Date Published2005/06/14

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

Short TitleJ. Phys. B: At. Mol. Opt. Phys.