title: Experimental repetitive quantum error correction.
abstract: The computational potential of a quantum processor can only be unleashed if errors during a quantum computation can be controlled and corrected for. Quantum error correction works if imperfections of quantum gate operations and measurements are below a certain threshold and corrections can be applied repeatedly. We implement multiple quantum error correction cycles for phase-flip errors on qubits encoded with trapped ions. Errors are corrected by a quantum-feedback algorithm using high-fidelity gate operations and a reset technique for the auxiliary qubits. Up to three consecutive correction cycles are realized, and the behavior of the algorithm for different noise environments is analyzed.
authors: Institut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria.
authors: Philipp
authors: P
authors: Schindler
authors: Julio T
authors: JT
authors: Barreiro
authors: Thomas
authors: T
authors: Monz
authors: Volckmar
authors: V
authors: Nebendahl
authors: Daniel
authors: D
authors: Nigg
authors: Michael
authors: M
authors: Chwalla
authors: Markus
authors: M
authors: Hennrich
authors: Rainer
authors: R
authors: Blatt