Electric-Field-Induced Coherent Control of Nitrogen Vacancy Centers

TL;DR

This paper demonstrates a scalable, energy-efficient method for coherently controlling nitrogen-vacancy centers using voltage-tunable magnetic stray fields from a magnetic tunnel junction, advancing quantum technology applications.

Contribution

It introduces a hybrid system enabling electrical control of NV centers via magnetic stray fields, with systematic tunability and improved scalability over existing techniques.

Findings

Coherent manipulation of NV centers achieved using magnetic tunnel junctions.

Electrical tunability of NV-MTJ coupling demonstrated with DC bias voltage.

Enhanced scalability and energy efficiency compared to current methods.

Abstract

Enabling scalable and energy-efficient control of spin defects in solid-state media is desirable for realizing transformative quantum information technologies. Exploiting voltage-controlled magnetic anisotropy, we report coherent manipulation of nitrogen-vacancy (NV) centers by the spatially confined magnetic stray fields produced by a proximate resonant magnetic tunnel junction (MTJ). Remarkably, the coherent coupling between NV centers and the MTJ can be systematically controlled by a DC bias voltage, allowing for appreciable electrical tunability in the presented hybrid system. In comparison with current state-of-the-art techniques, the demonstrated NV-based quantum operational platform exhibits significant advantages in scalability, device compatibility, and energy-efficiency, further expanding the role of NV centers in a broad range of quantum computing, sensing, and communications applications.