title: Near-optimal dynamical decoupling of a qubit.
abstract: We present a near-optimal quantum dynamical decoupling scheme that eliminates general decoherence of a qubit to order n using O(n2) pulses, an exponential decrease in pulses over all previous decoupling methods. Numerical simulations of a qubit coupled to a spin bath demonstrate the superior performance of the new pulse sequences.
authors.affiliation: HRL Laboratories, LLC, 3011 Malibu Canyon Road, Malibu, California 90265, USA.
authors.forename: Jacob R
authors.initials: JR
authors.lastname: West
authors.forename: Bryan H
authors.initials: BH
authors.lastname: Fong
authors.forename: Daniel A
authors.initials: DA
authors.lastname: Lidar