- #1
Haorong Wu
- 413
- 89
Hello. I am trying to learn quantum field theory. I am crazy about it but I have some problems in my study.
I use An Introduction to Quantum Field Theory by Peskin and Schroeder. It is said that the book is easier to learn than other books. However, I have to spend a lot of time in computing and deriving equations along the context.
For example, ##\left ( \partial ^2 +m ^2 \right )\phi ^{'} \left ( x \right )= \left [ \left ( \Lambda ^{-1}\right )^{\nu} _{\mu} \partial _\nu \left ( \Lambda ^{-1}\right ) ^{\sigma \mu} \partial_\sigma +m^2 \right] \phi \left ( \Lambda ^{-1} x\right )## where ##\phi^{'} \left ( x \right ) =\phi \left ( \Lambda ^{-1} x \right )##.
It costed me more than an hour to get the expression on the right side. Should I focus on those physical pictures and leave the mathematical part aside?
I have learned the graduate level's quantum mechanics and group theory. Should I learn other prerequisite courses fist?
Did you feel difficult when you first learned it?
Thanks!
I use An Introduction to Quantum Field Theory by Peskin and Schroeder. It is said that the book is easier to learn than other books. However, I have to spend a lot of time in computing and deriving equations along the context.
For example, ##\left ( \partial ^2 +m ^2 \right )\phi ^{'} \left ( x \right )= \left [ \left ( \Lambda ^{-1}\right )^{\nu} _{\mu} \partial _\nu \left ( \Lambda ^{-1}\right ) ^{\sigma \mu} \partial_\sigma +m^2 \right] \phi \left ( \Lambda ^{-1} x\right )## where ##\phi^{'} \left ( x \right ) =\phi \left ( \Lambda ^{-1} x \right )##.
It costed me more than an hour to get the expression on the right side. Should I focus on those physical pictures and leave the mathematical part aside?
I have learned the graduate level's quantum mechanics and group theory. Should I learn other prerequisite courses fist?
Did you feel difficult when you first learned it?
Thanks!