- #1
muppet
- 608
- 1
Hi all,
I'm trying to teach myself the basics of QFT. I'm using Peskin and Schroeder, and having a few difficulties reproducing a couple of the calculations. I don't think I've made careless algebraic slips, so before I show my working explicitly and beg for proof-reading I'd like to ask a couple of general questions.
Firstly, canonical quantisation.
1)Does the field operator act multiplicatively, as the ladder operators act on the complex exponentials inside the integral?
2)Is there an explicit relationship between the operators
[tex]a_{p} , a_{-p}[/tex]
and a corresponding one for their adjoints? (Possibly one valid only when integrating over all momentum?) When trying to compute the hamilitonian and momentum operators (starting from the expressions 2.27, 2.28), I'm getting expressions in terms of operators in p and in -p, and it's not clear to me that they're equivalent to those given.
Secondly, are there anything wrong with the relation
[tex]\varepsilon^{ijk}\varepsilon_{ipq}=\delta^{j}_{p}\delta^{k}_{q}-\delta^{j}_{q}\delta^{k}_{p}[/tex]
as applied to the 3d levi-civita symbol living in the spatial components of minkowski space?
Thanks in advance.
EDIT:Thanks christo
I'm trying to teach myself the basics of QFT. I'm using Peskin and Schroeder, and having a few difficulties reproducing a couple of the calculations. I don't think I've made careless algebraic slips, so before I show my working explicitly and beg for proof-reading I'd like to ask a couple of general questions.
Firstly, canonical quantisation.
1)Does the field operator act multiplicatively, as the ladder operators act on the complex exponentials inside the integral?
2)Is there an explicit relationship between the operators
[tex]a_{p} , a_{-p}[/tex]
and a corresponding one for their adjoints? (Possibly one valid only when integrating over all momentum?) When trying to compute the hamilitonian and momentum operators (starting from the expressions 2.27, 2.28), I'm getting expressions in terms of operators in p and in -p, and it's not clear to me that they're equivalent to those given.
Secondly, are there anything wrong with the relation
[tex]\varepsilon^{ijk}\varepsilon_{ipq}=\delta^{j}_{p}\delta^{k}_{q}-\delta^{j}_{q}\delta^{k}_{p}[/tex]
as applied to the 3d levi-civita symbol living in the spatial components of minkowski space?
Thanks in advance.
EDIT:Thanks christo
Last edited: