# Cooperative Effects in Closely Packed Quantum Emitters with Collective Dephasing

## TL;DR

This paper demonstrates that strong collective dephasing can restore cooperative effects in closely packed quantum emitters, enhancing dipole forces compared to non-interacting ensembles, with implications for solid state quantum systems.

## Contribution

It reveals that collective dephasing can revive cooperative effects in dense quantum emitter ensembles, a phenomenon previously suppressed by dipole-dipole interactions.

## Key findings

- Enhanced dipole force in strongly driven, collectively dephased ensembles.
- Restoration of cooperative effects despite dense packing.
- Relevance to solid state quantum systems like color centers and superconducting qubits.

## Abstract

In a closely packed ensemble of quantum emitters, cooperative effects are typically suppressed due to the dephasing induced by the dipole-dipole interactions. Here, we show that by adding sufficiently strong collective dephasing cooperative effects can be restored. In particular, we show that the dipole force on a closely packed ensemble of strongly driven two-level quantum emitters, which collectively dephase, is enhanced in comparison to the dipole force on an independent non-interacting ensemble. Our results are relevant to solid state systems with embedded quantum emitters such as colour centers in diamond and superconducting qubits in microwave cavities and waveguides.