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Dynamical Control of Cs Atoms in an Optical Lattice using Microwave Manipulation

Enrique Montano, University of Arizona

(Session 5 : Friday from 5:00-7:00)

Abstract. Enrique Montaño, Jae Hoon Lee, Poul Jessen College of Optical Sciences, University of Arizona, Tucson, AZ Brian Mischuck, Ivan Deutch Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM Many schemes for quantum information processing in optical lattices require quantum coherent transport of the atomic qubits. Such transport usually relies on tunneling or dynamical changes in the lattice potential. We are developing a new, more controllable and potentially far more robust approach based on µw transitions between the sites of a spinor lattice. As a first step, we have demonstrated the ability to coherently transfer a qubit between well-defined vibrational states at neighboring lattice sites. We will explore the types of dynamical control this can lead to in our spinor lattice system. In a lattice composed of counter propagating beams with orthogonal, linear polarizations (the lin-90˚-lin configuration) a µw field will couple each site equally to its neighbors, and the spatial wavefunction of an atom will spread out over the sites in a continuous-time random walk. In a lin-theta≠90˚-lin lattice the symmetry is broken and each site is coupled to a single neighboring site either to the left or to the right, depending on the choice of theta. With this configuration, controlled transport over the entire lattice can be constructed from a series of pairwise couplings.