# The effect of dipole-dipole interaction on tripartite entanglement in different cavities

## TL;DR

This paper investigates how dipole-dipole interactions, initial phase, and coupling strength influence the dynamics and preservation of tripartite entanglement in atoms within different cavity regimes, highlighting conditions to avoid entanglement loss.

## Contribution

It demonstrates that strong dipole-dipole interactions can prevent entanglement sudden death and enable entanglement preservation, offering insights for quantum technology applications.

## Key findings

- Strong dipole-dipole interaction prevents entanglement sudden death.
- Initial phase choice critically affects entanglement dynamics.
- Entanglement can be frozen under specific conditions with strong interactions.

## Abstract

The effect of dipole-dipole interaction, the initial relative phase and the coupling strength with the cavity on the dynamics of three two level atoms in the good and the bad cavity regime are investigated. It is found that the presence of strong dipole-dipole interaction not only ensures avoiding entanglement sudden death but also retains entanglement for long time. The choice of the phase in the initial state is crucial to the operational regime of the cavity. Under specific conditions, the entanglement can be frozen in time to its initial values through strong dipole-dipole interaction. This trait of tripartite entanglement may prove helpful in engineering multiparticle entanglement for the practical realization of quantum technology.