If Roger Zelazny had written the Amber books today I’m sure he would have had a Courts of Entropy instead of Chaos. But I digress…
The Holographic Principal states that a 5-D universe can be encoded holographically on a 4-D universe. Just as a 3-D object can be captured in a flat hologram. The implications are that the supertring universe of 5 dimensions can be seen by thinking of our own universe as a hologram. Using this principal some really smart guys (including George Smoot of Nobel fame) proposed on arXiv that dark energy in our universe is only a holographic affect of an entropic force in higher dimensions.
They develop their theory and use it to predict the amount of dark energy we should see in our universe. Unless there are mistakes in their reasoning, which I cannot judge, the most interesting thing is how close the prediction is to the dark energy seen in the supernova data—you know the data that showed our universe is expanding at an accelerating rate. The other interesting thing is this how people are beginning to find observable predictions in String/M-theory.
I’m going to have to pay more attention to this Entropy stuff.
BTW Motl has some thoughts on this paper too.