title: Coherent error suppression in multiqubit entangling gates.
abstract: We demonstrate a simple pulse shaping technique designed to improve the fidelity of spin-dependent force operations commonly used to implement entangling gates in trapped ion systems. This extension of the Mølmer-Sørensen gate can theoretically suppress the effects of certain frequency and timing errors to any desired order and is demonstrated through Walsh modulation of a two qubit entangling gate on trapped atomic ions. The technique is applicable to any system of qubits coupled through collective harmonic oscillator modes.
authors.affiliation: Joint Quantum Institute and Department of Physics, University of Maryland, College Park, Maryland 20742, USA. dhayes12@umd.edu
authors.forename: D
authors.initials: D
authors.lastname: Hayes
authors.forename: S M
authors.initials: SM
authors.lastname: Clark
authors.forename: S
authors.initials: S
authors.lastname: Debnath
authors.forename: D
authors.initials: D
authors.lastname: Hucul
authors.forename: I V
authors.initials: IV
authors.lastname: Inlek
authors.forename: K W
authors.initials: KW
authors.lastname: Lee
authors.forename: Q
authors.initials: Q
authors.lastname: Quraishi
authors.forename: C
authors.initials: C
authors.lastname: Monroe