Ensemble control is a research area in control theory that focuses on coordinating the actions of multiple interconnected systems in order to achieve a common goal. This can involve optimizing the performance of a group of systems, ensuring robustness and reliability, or adapting to changing environmental conditions. Ensemble control often relies on decentralized decision-making processes and communication among the individual systems to effectively achieve overall coordination and cooperation. This area of research is particularly relevant in fields such as robotics, autonomous vehicles, distributed sensor networks, and swarm intelligence.