Phase-adaptive dynamical decoupling methods for robust spin-spin dynamics in trapped ions

TL;DR

This paper introduces phase-adaptive pulsed dynamical decoupling methods using random and correlated pulse phases to enhance the robustness of spin-spin entanglement in trapped ion quantum systems.

Contribution

It adapts and applies phase-adaptive dynamical decoupling techniques from NMR to improve quantum information processing in trapped ions.

Findings

Enhanced robustness of spin-spin dynamics with phase-adaptive DD

Effective suppression of environmental noise in trapped ions

Demonstration of NMR principles in quantum information context

Abstract

Quantum platforms based on trapped ions are main candidates to build a quantum hardware with computational capacities that largely surpass those of classical devices. Among the available control techniques in these setups, pulsed dynamical decoupling (pulsed DD) revealed as a useful method to process the information encoded in ion registers, whilst minimising the environmental noise over them. In this work, we incorporate a pulsed DD technique that uses random pulse phases, or correlated pulse phases, to significantly enhance the robustness of entangling spin-spin dynamics in trapped ions. This procedure was originally conceived in the context of nuclear magnetic resonance for nuclear spin detection purposes, and here we demonstrate that the same principles apply for robust quantum information processing in trapped-ion settings.