Textbook about Perturbation Theory

[Fips]

Hi

I was hoping someone could advise me on a textbook/platform where I can learn more about the perturbation theory applied to helium and the perturbation theory time depedant. Thanks

 

[noir1993]

Hi

I was hoping someone could advise me on a textbook/platform where I can learn more about the perturbation theory applied to helium and the perturbation theory time depedant. Thanks

Almost every quantum mechanics textbook has a couple of chapters on perturbation theory. Are you looking for anything more specific?

 

[Fips]

@noir1993 Well there's a lot of things I still don't understand and don't even know if they're related, like if the varational method is used for a perturbated state, on which occasion we consider an event a perturbation to the system...
Currently I'm using Resnick's and Wolfgang's books. Do you recommend them? Thanks