> So, I don't understand any of the math in that paper but is there any easy/intuitive way to explain why a higher information density would require negative fr

> So, I don't understand any of the math in that paper but is there any easy/intuitive way to explain why a higher information density would require negative free energy? Not really, no. If you don't have the equivalent of a good undergraduate education in physics very little about QFT is going to be accessible to you.