title: High-fidelity quantum operations on superconducting qubits in the presence of noise.
abstract: We present a scheme for implementing quantum operations with superconducting qubits. Our approach uses a "coupler" qubit to mediate a controllable interaction between data qubits, pulse sequences which strongly mitigate the effects of 1/f flux noise, and a high-Q resonator-based local memory. We develop a Monte Carlo simulation technique capable of describing arbitrary noise-induced dephasing and decay, and demonstrate in this system a set of universal gate operations with O(10(-5)) error probabilities in the presence of experimentally measured levels of 1/f noise. We then add relaxation and quantify the decay times required to maintain this error level.
authors.affiliation: Lincoln Laboratory, Massachusetts Institute of Technology, Lexington, Massachusetts 02420, USA.
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Kerman
authors.forename: William D
authors.initials: WD
authors.lastname: Oliver