# Adiabatic population transfer of dressed spin states with quantum optimal control

## TL;DR

This paper demonstrates that using dressed spin states combined with quantum optimal control techniques like CRAB can significantly improve the efficiency and robustness of adiabatic population transfer in NV centers by suppressing spin dephasing effects.

## Contribution

The study introduces a novel approach combining dressed spin states with CRAB-based quantum optimal control for enhanced adiabatic population transfer in NV centers.

## Key findings

- Dressed spin states effectively suppress spin dephasing.
- CRAB control enables efficient and robust transfer.
- Numerical simulations confirm improved transfer performance.

## Abstract

We report theoretical studies of adiabatic population transfer using dressed spin states. Quantum optimal control using the algorithm of Chopped Random Basis (CRAB) has been implemented in a negatively charged diamond nitrogen vacancy center that is coupled to a strong and resonant microwave field. We show that the dressed spin states are highly effective in suppressing effects of spin dephasing on adiabatic population transfer. The numerical simulation also demonstrates that CRAB-based quantum optimal control can enable an efficient and robust adiabatic population transfer.

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Source: https://tomesphere.com/paper/1903.12651