Most universities I checked have a Quantum Information group, and they usually mention the term "Quantum Computing" somewhere on their website, but it's not very clear how much research is actually done in Quantum Computing.
I would like to study at an institution where there are at least 2-3 potential supervisors who perform active research in Quantum Computing and are willing to take new students. (I plan to begin my PhD in the 2015/2016 academic year.)