I have a problem in understanding the steps from vectors to operators.
Imagine you are given a vectorial observable.
In classical mechanics, after rotating the system it transform with a rotation matrix R.
If we go to quantum mechanics, this observable becomes an operator that is...
I wanted to study the theory about Fano resonances. I tried to read the paper but it doesn't seem very pedagogical to me and I coudn't understand all the details. Are there any notes or any good book where I can find a more precise theoretical description?
Good evening to everybody!
I have a question concerning monolayer graphene.
In all the papers I read it is well specified that K and K' in graphene are not equivalent points, but I didn't find anywhere where is the difference between them. Can anybody tell me where this difference is coming...