If alien civilizations use hyper-efficient computers, they will have a distinct energy signal we can detect

Love it or hate it, artificial intelligence is likely here to stay. Its ravenous need for computational power has overwhelmed chip manufacturers and power companies alike. While our current AI obsession is likely a bubble ready to burst, we won't simply stop using computers. Since their first invention, computers have continued to grow more powerful, and our civilization has grown ever more dependent on them. Computation defines our civilization. Perhaps computational power is what defines any advanced civilization. If that's the case, then the most advanced civilizations in the universe would push computing to its most powerful and efficient state.