Robust trapped-ion quantum logic gates by continuous dynamical decoupling

A. Bermudez*, P. O. Schmidt, M. B. Plenio, A. Retzker

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

78 Scopus citations

Abstract

We introduce a scheme that combines phonon-mediated quantum logic gates in trapped ions with the benefits of continuous dynamical decoupling. We demonstrate theoretically that a strong driving of the qubit decouples it from external magnetic-field noise, enhancing the fidelity of two-qubit quantum gates. Moreover, the scheme does not require ground-state cooling, and is inherently robust to undesired ac Stark shifts. The underlying mechanism can be extended to a variety of other systems where a strong driving protects the quantum coherence of the qubits without compromising the two-qubit couplings.

Original languageAmerican English
Article number040302
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume85
Issue number4
DOIs
StatePublished - 4 Apr 2012
Externally publishedYes

Fingerprint

Dive into the research topics of 'Robust trapped-ion quantum logic gates by continuous dynamical decoupling'. Together they form a unique fingerprint.

Cite this