PRECISION COHERENT MICROWAVE OPERATIONS ON ULTRACOLD ATOMS IN AN OPTICAL LATTICE

Steven Olmschenk, Roger C. Brown, Martin Zelan, Radu Chicireanu, Karl D. Nelson, Saijun Wu, and James V. Porto

Ultracold atoms in an optical lattice are a leading candidate for quantum information processing.  However, large-scale operations will require exquisite control of each quantum bit, as well as extended storage time of this information.  We have performed a randomized benchmarking protocol to demonstrate an average error per single qubit gate operation of 1.4(1) x 10^-4.  In addition, we apply new techniques to extend the coherence time of these quantum bits.   These results demonstrate the viability of the system for more advanced applications in quantum information.