Coherent Dipolar Coupling between Magnetoelastic Waves and Nitrogen Vacancy Centers

TL;DR

This paper demonstrates a novel, voltage-driven method to coherently control nitrogen vacancy centers using magnetoelastic waves, achieving efficient, long-distance coupling without relying on long spin-wave coherence.

Contribution

It introduces a new approach for quantum control of NV centers via magnetoelastic waves driven by voltage, enabling efficient, long-range coupling.

Findings

Coherent Rabi oscillations of NV centers were achieved using magnetoelastic waves.

The method shows improved RF power efficiency over traditional microwave excitation.

Coupling occurs over millimeter-scale distances from the excitation source.

Abstract

We experimentally demonstrate coherent Rabi oscillations of Nitrogen Vacancy (NV) centers by magnetoelastic waves. The coupling is consistent with dipolar stray field drive from spin-wave modes in a ferromagnetic film, and displays a significant improvement in Radio Frequency power efficiency relative to other methods of microwave excitation. Further, it demonstrates coherent coupling with NV centers over mm-scale distances from the microwave excitation source. By utilizing a piezoelectric-magnetostrictive heterostucture, where magnetoelastic waves can be launched by an applied voltage, a pure voltage driven coherent drive of the NV centers is achieved. This voltage driven, magnetoelastic excitation enables a new approach to couple with two level quantum states that is not reliant on long spin-wave coherence lengths.