Quantum Information Processing with Two Atomic Species Confined in Independently Controlled Optical Lattices

We present progress toward scalable quantum information processing using fermionic $^6$Li and bosonic $^{133}$Cs each confined in an independently controlled optical lattice. The $^6$Li atoms, loaded with one atom per site, act as quantum bits (qubits) to store information while $^{133}$Cs, loaded with one atom per one hundred sites, is a messenger bit to mediate gate operations and carry entanglement between $^6$Li qubits. We demonstrate the fabrication of identical and stable hexagonal optical lattices at 680nm for $^6$Li and 1064nm for $^{133}$Cs using a diffraction grating and common mode optics. Qubit operations are performed by spatially overlapping a messenger and qubit. This is done by phase shifting the lattices with an electro-optic modulator array that can either adiabatically shift an atom over one lattice site in 11$\mu$s, or rapidly shift the lattice in 100ns such that no atomic motion occurs. These two modes allow the messenger atom to ``step'' across the lattice to address any (distant) $^6$Li qubit.