Neutral Atoms in an Optical Lattice for Quantum Information Processing.

 

C. Fertig, J. Huckans, I. Spielman, J. Sebby-Strabely, K. O'Hara, S. Rolston, W. Phillips, and J. V. Porto,

 

We experimentally study Bose-Einstein Condensates in optical lattices as a promising candidate for scalable quantum information processing.  We study the superfluid-to-Mott-insulator transition as a means of initializing a quantum register of singly occupied lattice sites.  Interesting condensed matter phenomena of the Mott insulator in 1-dimension have been explored through transport measurements.  We are beginning experiments to assess the fidelity of the Mott state through spectroscopic measurements. Single q-bit operations can be realized using a 3-photon stimulated Raman coupling field. Also underway are experiments to realize 2-qubit operations in a 3D lattice of double-well potentials, where the strength of the barrier is tunable in real-time.