What's the rotator theory. I don't understand it. Why?

[neostart]

My question is, how to understand the rotator theory? I have problems with it, and we have QM in Poland only 1 year. Please help me with best links, because I don't know where should I search to understand.

[meteor]

Sure is rotator theory? Never heard such a thing before. Information about the quantum rotator can be found here:
http://arxiv.org/abs/chao-dyn/9711021

[neostart]

Thank's?! A lot of informations I found there. But it is about (in general) N-rotator's behaviour. I'm new in this thema. :bugeye: