# \emph{Ab initio} theory of $\text{N}_{2}\text{V}$ defect as quantum memory in diamond

## TL;DR

This paper uses ab initio density functional theory to model the N2V defect in diamond, demonstrating its potential as a long-lived quantum memory through detailed energy level and magneto-optical analysis.

## Contribution

It introduces a novel ab initio approach to accurately describe the energy levels of the N2V defect, proposing its application in quantum memory devices.

## Key findings

- Accurately models energy levels of N2V defect
- Identifies critical magneto-optical parameters for quantum memory
- Suggests N2V defect as a promising quantum memory candidate

## Abstract

$\text{N}_{2}\text{V}$ defect in diamond is characterized by means of \emph{ab initio} methods relying on density functional theory calculated parameters of a Hubbard model Hamiltonian. It is shown that this approach appropriately describes the energy levels of correlated excited states induced by this defect. By determining its critical magneto-optical parameters, we propose to realize a long-living quantum memory by $\text{N}_{2}\text{V}$ defect in diamond.