Backreaction has a long post on applications of the AdS/CFT correspondence in heavy ion physics. The topic is interesting because it is a potential experimental prediction derived from string theory. Interestingly, it doesn’t involve string theory as a theory of everything; instead it uses string theory ideas to make calculations about quark-gluon plasma.
Ars Mathematica
Dedicated to the mathematical arts.
Here’s a nice article on anti-de Sitter space (AdS) called the “The String Theory Landscape” at http://physicsweb.org/articles/world/16/11/3
Incidentally, is there a MATH counterpart to the above website’s homepage? (On a whim, I tried mathweb.org but it seems to be a software site.)