# Spin coherent quantum transport of electrons between defects in diamond

## TL;DR

This paper proposes a method for coherent quantum transport of electron spins between NV centers in diamond using spatial stimulated adiabatic passage, enabling potential on-chip quantum communication.

## Contribution

It introduces a novel approach for transporting electron spins between distant NV centers in diamond via optical control and adiabatic passage, advancing quantum bus development.

## Key findings

- High-fidelity transport over hundreds of nanometers
- Transport timescales of hundreds of nanoseconds
- Potential for on-chip quantum communication

## Abstract

The nitrogen-vacancy color center in diamond has rapidly emerged as an important solid-state system for quantum information processing. While individual spin registers have been used to implement small-scale diamond quantum computing, the realization of a large-scale device requires development of an on-chip quantum bus for transporting information between distant qubits. Here we propose a method for coherent quantum transport of an electron and its spin state between distant NV centers. Transport is achieved by the implementation of spatial stimulated adiabatic Raman passage through the optical control of the NV center charge states and the confined conduction states of a diamond nanostructure. Our models show that for two NV centers in a diamond nanowire, high fidelity transport can be achieved over distances of order hundreds of nanometres in timescales of order hundreds of nanoseconds. Spatial adiabatic passage is therefore a promising option for realizing an on-chip spin quantum bus.