Experimental realization of robust dynamical decoupling with bounded controls in a solid-state spin system

TL;DR

This paper experimentally demonstrates a robust dynamical decoupling protocol using bounded controls and Eulerian cycles, significantly extending coherence times in a solid-state spin system under various noise conditions.

Contribution

The study introduces a new Eulerian decoupling scheme with bounded controls that enhances coherence times without requiring strong control pulses.

Findings

Increased coherence time by two orders of magnitude.

Effective under dephasing and universal noise environments.

Eliminates the need for strong control pulses.

Abstract

We experimentally demonstrate a robust dynamical decoupling protocol with bounded controls using long soft pulses, eliminating a challenging requirement of strong control pulses in conventional implementations. This protocol is accomplished by designing the decoupling propagators to go through a Eulerian cycle of the coupler group [Phys. Rev. Lett. 90, 037901(2003)]. We demonstrate that this Eulerian decoupling scheme increases the coherence time by two orders of magnitude in our experiment under either dephasing or a universal noise environment.