# Dynamical and quantum effects of collective dissipation in optomechanical systems

## TL;DR

This paper investigates how collective dissipation influences optomechanical systems, revealing that it can enhance synchronization, entanglement, and cooling, even without direct mechanical coupling, thus offering new insights into quantum device control.

## Contribution

It introduces the concept of collective dissipation effects in optomechanical systems and demonstrates their role in enhancing quantum phenomena without direct mechanical interactions.

## Key findings

- Collective dissipation can induce synchronization without direct mechanical coupling.
- Enhanced entanglement and cooling are achievable through collective dissipation.
- Mechanisms for these effects are thoroughly analyzed and explained.

## Abstract

Optomechanical devices have been cooled to ground-state and genuine quantum features, as well as long-predicted nonlinear phenomena, have been observed. When packing close enough more than one optomechanical unit in the same substrate the question arises as to whether collective or independent dissipation channels are the correct description of the system. Here we explore the effects arising when introducing dissipative couplings between mechanical degrees of freedom. We investigate synchronization, entanglement and cooling, finding that collective dissipation can drive synchronization even in the absence of mechanical direct coupling, and allow to attain larger entanglement and optomechanical cooling. The mechanisms responsible for these enhancements are explored and provide a full and consistent picture.