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Randomized benchmarking of atomic qubits and differential light shift cancellation in an optical lattice

Steven Olmschenk, Joint Quantum Institute, National Institute of Standards and Technology and University of Maryland Department of Physics

(Session 3 : Friday from 11:15am-11:45am)

Abstract. We perform randomized benchmarking on atomic qubits confined in an optical lattice. Single qubit rotations are implemented using microwaves, with a measured average error per gate of 1.4(1) x 10^-4 that is dominated by the decoherence time of the system. 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 demonstrated. Finally, we discuss how these gate operations might be performed with single-lattice-site addressability for more advanced applications in quantum information.