Quantum Information with Atoms and Light- Given by Steven Olmschenk
Rapid progress in coherent control of single trapped atomic ions and ensembles of ultracold atoms in optical lattices has enabled more precise atomic physics measurements, a probe of fundamental quantum
physics, and progress towards quantum information processing. Here I present recent results on approaches to quantum information with each of these systems. Using ytterbium ions coupled to single photons, we demonstrate a quantum teleportation protocol between two distant matter qubits with a measured fidelity of 90(2)%. With atoms in an
optical lattice, we perform randomized benchmarking of single qubit operations, measuring an average error per gate of 1.4(1) x 10^-4. A method to extend the coherence time by cancellation of up to 95(2)% of
the differential light shift in the ground state of rubidium is also implemented. Finally, I discuss how these gate operations might be extended for more advanced applications.
Location: Jadwin 303
Date/Time: 02/04/11 at 1:30 pm - 02/04/11 at 3:00 pm
Category: Special Seminar