Scalable Quantum Computation using Two Atomic Species in Independent Optical Lattices

We confine bosonic $^{133}$Cs and fermionic $^{6}$Li atoms in a dipole trap to evaporatively cool and study the interspecies collision properties as a first step toward quantum information processing. Ultimately, each species will be confined by an independent optical lattice. Cooling the Li atoms into a degenerate band-insulator will allow uniform loading of 1atom/site. These Li atoms will act as quantum bits (qubits). Cs atoms will have a lower filling ratio of 1atom/100sites and will act as messengers to carry entanglement among the qubits. We present a novel technique to create commensurate lattices at 680nm for Li and 1064nm for Cs. One laser beam at each color is split into multiple beams by a diffractive optical element and recombined at the atoms to create independent triangular optical lattices. By relatively translating the two lattices using electro-optic modulators, the Cs messenger atoms can be translated to any Li qubit to perform entangling operations.