Dual Degeneracy of Lithium and Cesium Atoms for Scalable Quantum Information Processing

We describe first steps in an experiment aimed at scalable quantum information processing with quantum degenerate gases of two atomic species. We discuss simultaneous evaporation of fermionic $^{6}$Li and bosonic $^{133}$Cs atoms. Both atomic species are cooled and trapped in independent magento-optical traps and subsequently transferred to a single dipole trap for evaporative cooling. Cooling the $^{6}$Li atoms into a degenerate band-insulator will allow uniform loading into the optical lattice of one atom/site. These atoms will act as quantum bits (qubits) to store quantum information. A second lattice will confine $^{133}$Cs messenger atoms that will have a low filling ratio of $\sim $1 atom per 100 sites. By translating one lattice relative to the other, the $^{133}$Cs messengers can be transported to any $^{6}$Li qubit for entangling operations. Initial experiments study the interspecies collision properties, serving to guide strategies to implement collision-based entangling operations.