Nuclear Electric Resonance for Spatially-Resolved Spin Control via Pulsed Optical Excitation in the UV-Visible Spectrum

TL;DR

This paper introduces optical nuclear electric resonance (ONER), a novel method using pulsed UV-visible light to achieve spatially-resolved nuclear spin control by modulating electron density and electric field gradients.

Contribution

It proposes and theoretically analyzes a new ONER technique for coherent nuclear spin control using optical excitation, enhancing spatial resolution in quantum systems.

Findings

ONER can potentially enable atomic-scale spin manipulation.

The formalism provides a foundation for experimental realization.

Limitations include electron density fluctuation constraints.

Abstract

Nuclear electric resonance (NER) spectroscopy is currently experiencing a revival as a tool for nuclear spin-based quantum computing. Compared to magnetic or electric fields, local electron density fluctuations caused by changes in the atomic environment provide a much higher spatial resolution for the addressing of nuclear spins in qubit registers or within a single molecule. In this article, we investigate the possibility of coherent spin control in atoms or molecules via nuclear quadrupole resonance from first principles. An abstract, time-dependent description is provided which entails and reflects on commonly applied approximations. This formalism is then used to propose a new method we refer to as `optical' nuclear electric resonance (ONER). It employs pulsed optical excitations in the UV-visible light spectrum to modulate the electric field gradient at the position of a specific nucleus of interest by periodic changes of the surrounding electron density. Possible realizations and limitations of ONER for atomically resolved spin manipulation are discussed and tested on $^9$Be as an atomic benchmark system via electronic structure theory.