Scalable Register Initialization for Quantum Computing in a Optical Lattice
G K. Brennen, G Pupillo, A M. Rey, Charles W. Clark, Carl J. Williams
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 an 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 magnetic field 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.
Journal of Physics B-Atomic Molecular and Optical Physics
Many-Body Theory, quantum computation
, Pupillo, G.
, Rey, A.
, Clark, C.
and Williams, C.
Scalable Register Initialization for Quantum Computing in a Optical Lattice, Journal of Physics B-Atomic Molecular and Optical Physics
(Accessed December 5, 2023)