Dynamical decoupling of spin ensembles with strong anisotropic interactions

TL;DR

This paper investigates how dynamical decoupling can mitigate decoherence caused by anisotropic spin interactions in dopant ensembles, relevant for quantum technology applications, through both theory and experiments.

Contribution

It demonstrates that dynamical decoupling partially reduces decoherence in systems with strong anisotropic interactions, extending understanding of coherence preservation in quantum devices.

Findings

Dynamical decoupling alleviates decoherence but does not fully eliminate it.

Strong anisotropic interactions limit the effectiveness of decoupling.

Results are applicable to quantum sensing, microwave-to-optical conversion, and quantum memory.

Abstract

Ensembles of dopants have widespread applications in quantum technology. The miniaturization of corresponding devices is however hampered by dipolar interactions that reduce the coherence at increased dopant density. We theoretically and experimentally investigate this limitation. We find that dynamical decoupling can alleviate, but not fully eliminate, the decoherence in crystals with strong anisotropic spin-spin interactions. Our findings can be generalized to all quantum systems with anisotropic g-factor used for quantum sensing, microwave-to-optical conversion, and quantum memory.