Having been on this website for a while, it becomes pretty clear that this community definitely includes plenty of members (some younger than me) who probably know at least rudimentary quantum mechanics, if not quantum field theory. I've seen requests posted to create a quantum mechanics topic, but I'm not aware that it is in the making. Is this currently being worked on? If it isn't, I think that it really should be done. I'd personally find it very helpful to drill Dirac notation problems or expand an energy eigen basis on here every now and again.