Information is physics: Information (bits) can be viewed as energy. This view allows use of tools and formulas from statistical physics and relate these to information theory (Shannon Entropy == Energy Entropy). It then becomes possible to describe and quantify the information flow between systems, or the thermodynamic cost (heat generation) of computation/flipping bits. It allows for units of measurements such as temperature and pressure to be applied to information.

Physics is information: Energy can be viewed as information. Some researchers investigate the notion of "it from bit": that all of physical reality is the result, and derives its essence, from yes-no bit strings/Turing programs. This view offers answers to the limits of physical inference machines such as the human brain. It leads to the field of digital physics, offering a notion of a computational universe, applying our knowledge of algorithmic information theory, such as the distribution of random strings, to physical reality.

Scott Aaronson has a nice blog post[1] on the same subject. Basically, information is a physical thing in the universe and is just as important as space or energy or time.

1: https://www.scottaaronson.com/blog/?p=3327

There's a lot here but this specifically talks about AdS/CFT which seems to be a pretty core concept https://www.youtube.com/watch?v=klpDHn8viX8

Just linked this on a similar information theory thread [1] (glad it's so popular on HN right now!)

1: https://news.ycombinator.com/item?id=21653230

A contest near the end of this chart: https://xkcd.com/435/