Adam Brown

That's not always true.

There are these plasma physics is itself extremely complicated, and there are these big collisions that we do at

Rick, in Brookhaven, where we smash two gold atoms together and make big fireballs of quark to one plasma.

And it's extremely challenging to calculate what would happen there.

And yet people use this duality in the opposite direction to say, even though it looks super complicated with this weird plasma physics, in the non-gravitational theory, it actually can simply be understood as some simple black hole property in the gravitational theory.

Yeah, people are working on that.

That is an open area of research.

Ever since the original ADS-CFT was written down, people have been trying to formulate versions of it in which have a positive cosmological constant.

It's difficult, and part of the difficulty is

It goes all the way back to Archimedes.

It is easiest to formulate a theory if you have a fixed point on which to stand and observe things from a distance.

In a universe with a positive cosmological constant, you don't have that.

You don't have that.

You're necessarily mixed up with the system.

Because you live in a universe that has only a finite amount of entropy, a finite amount of free energy...

There is inherent limitation to the precision of the experiments you can do.

That just makes things way trickier.

So for that and related reasons, it's a much harder project.

But for sure, people are working on that.

Yeah, okay, that's a good question.