# Universal evolution of non-classical correlations due to collective spontaneous emission

## TL;DR

This paper investigates how collective spontaneous emission influences the evolution of quantum correlations between two atoms, showing that collective effects can sustain non-classical correlations over time, especially at small interatomic distances.

## Contribution

It demonstrates the universal behavior of non-classical correlations due to collective spontaneous emission in a Markovian environment, highlighting the roles of collective damping and dipole-dipole interactions.

## Key findings

- Quantum correlations are enhanced by collective damping and dipole-dipole interactions.
- Non-classical correlations can be maintained over long times at small atomic distances.
- The study provides insight into the dynamics of quantum correlations in collective emission processes.

## Abstract

We explore the spontaneous generation and decay of quantum correlations between two identical atoms coupled to a common Markovian environment in the presence of electromagnetic field modes. For this purpose, we analyze the dynamics of quantum correlations by employing the concurrence, the trace quantum discord and the local quantum uncertainty, for collective Dicke states. It is shown that the collective damping and dipole-dipole interaction plays a key role in enhancing non-classical correlations during the process of intrinsic decoherence. The quantum correlations can be maintained over a long time but for small distance between the two atoms.