Recent content by ginda770

Thanks Eugene, I'll try to track down the Weinberg book. diazona: I only just started reading Srednicki, but I agree with your assessment of P&S. I need to find an introduction to QFT that is actually an introduction, P&S leave out so many steps in their arguments, it reminds me of Jackson's...

Thanks for your reply too Fredrik.

Thanks so much for your replies Fermi and Eugene, I think you are both correct. When I look back at the texts, most of them are indeed talking about the Klein Gordon field, not the Schrodinger wave function. I think the reason I got confused was that I was reading Srednicki's online QFT notes...

I hope someone can explain this to me: In multiple textbooks I've seen it said that a single particle wave function (no spin) transforms as a Lorentz scalar. I.e. if we have a Lorentz transformation from an old frame to a new frame \overline{x}=\Lambda x (x is short for (t,x,y,z)) then...

Never mind, I figured it out. Stupid question. :tongue:

I was hoping someone could help me with a seeming paradox involving the Dirac equation. I have taken a non-relativistic QM course, but am new to relativistic theory. The Dirac equation is (following Shankar) i\frac{\partial}{\partial t}\psi = H\psi where H = \vec{\alpha}\cdot...

in our class there were 4 postulates. the second was that entropy is maximized. we were given a few entropy functions and had to decide which ones violated the second postulate

is there no one who can help?

if given enropy S as a function of energy U how do i tell that is obeys the second postulate?