# Strong Coupling between a Single NV Spin and the Rotational Mode of Diamonds Levitating in an Ion Trap

## TL;DR

This paper proposes a method to achieve strong coupling between a single NV center spin and the rotational mode of levitating nanodiamonds in an ion trap, enabling potential quantum control of rotational states.

## Contribution

It introduces a novel scheme for coupling NV center spins to rotational modes of levitating diamonds using ion traps and magnetic fields, which was not previously demonstrated.

## Key findings

- Asymmetry in nanodiamonds enables rotational confinement in ion traps.
- Strong spin-rotational coupling is achievable with magnetic and microwave control.
- Potential for quantum manipulation of rotational states of levitating diamonds.

## Abstract

A scheme for strong coupling between a single atomic spin and the rotational mode of levitating nanoparticles is proposed. The idea is based on spin read-out of NV centers embedded in aspherical nanodiamonds levitating in an ion trap. We show that the asymmetry of the diamond induces a rotational confinement in the ion trap. Using a weak homogeneous magnetic field and a strong microwave driving we then demonstrate that the spin of the NV center can be strongly coupled to the rotational motion of the diamond.