Dietrich Leibfried
QUANTUM ENGINEERING WITH TRAPPED IONS AT NIST
This talk will give an overview of different aspects of quantum engineering with trapped ions at NIST. By simultaneous manipulation of two ion species including single qubit rotations, two-qubit gates, transport in a linear trap array and sympathetic recooling we were able to perform some of the most complete demonstrations of building blocks towards a scalable architecture for quantum information processing with trapped ions to date. Moreover, we demonstrated ion transport through trap array junctions in a two-layer and a micro-fabricated surface electrode trap. In collaboration with R. Schmid (MPQ Garching) and J. Wesenberg (U. Oxford) we proposed new methods to implement quantum spin models in arrays of trapped ions. Finally, in collaboration with R. Maiwald (U. Erlangen) we demonstrated a "stylus" trap geometry that might enable detection of very weak (zepto-Newton) forces or, in combination with a deep parabolic mirror, enable coupling of the trapped ion to a single mode fiber with near unit efficiency. The latter application could potentially improve protocols for entangling ions, atoms or quantum dots by interference of spontaneously emitted photons without resorting to enhanced emission into optical cavities.
Work supported by DARPA, IARPA, ONR and the NIST Quantum Information Program.
