There's a huge body of literature in applying ideas from quantum information to the study of strongly interacting many body systems. If I have time I'll edit this answer with my own personal review (primarily all of the lovely simulation techniques that QIT has given a solid physical and conceptual foundation to) but as a jumping off point, there is a set of lecture notes with excellent references here.
This post imported from StackExchange Physics at 2014-04-05 04:18 (UCT), posted by SE-user wsc