- #1

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as long as you admit the quantum mechanics and the reletivity?

it seems that in Weinberg's book ,he shows that,but i can not

quite understand

thank you

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- Thread starter bugl0ver
- Start date

- #1

- 2

- 0

as long as you admit the quantum mechanics and the reletivity?

it seems that in Weinberg's book ,he shows that,but i can not

quite understand

thank you

- #2

- 3,768

- 10

regards

marlon

ps : i urge you not to use Weinberg's book to study intro QFT. Have you considered Zee's book (QFT in a Nutshell) ? Are you doing this in college ?

- #3

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i am a student learning theoretical physics.and i hav read some chapters

of Zee's book.and i think i can follow his idea rather than Weinberg:tongue2:

What i mean is that in many books such like Peskin's just tell us how to

calculate,and it induce the qft so abruptly.

So i think Wein's book will helpful.Maybe my question looks ugly and i think i get my answer myself now.

but what i want to know now is that is qft just a tool in some sence?

thank you

- #4

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1) in QM, the total number of particles is constant

2) In QFT, the fundamental property are the FIELDS while in QM they are the wavefunctions.

There are several quantum field theories like QED (describes the EM interaction), QCD (describes the strong force), etc etc

marlon

edit : check out this thread for further clarification

- #5

- 13,162

- 725

Daniel.

- #6

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I recommend Dirac's Lectures on Quantum Mechanics. It is about 5 bucks and is well worth it. The 2nd lecture is "The Problem of Quantization".

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