- #1
Niles
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Hi
I have a question regarding second quantization. In the following link: http://books.google.dk/books?id=v5v...q="The introduction of quantum field"&f=false (equation 1.71) they write the kinetic energy operator in real space representation, i.e. using quantum field operators. Here they rigourously transform the creation/annihilation operators using equation 1.69 the page before.
Now, if we take a look at equation 1.101 on page 24, they write the potential energy operator V in momentum space, but notice how they do not make the same rigourous transformation of the creation/annihilation operators, but merely substitute ν with k in equation (1.62) in their indices.
My question is, why they do not make that rigourous transformation in the case with k, but only change the indices of the operators. Can you shed some light on this?
I will appreciate any help you can give me.
Niles.
I have a question regarding second quantization. In the following link: http://books.google.dk/books?id=v5v...q="The introduction of quantum field"&f=false (equation 1.71) they write the kinetic energy operator in real space representation, i.e. using quantum field operators. Here they rigourously transform the creation/annihilation operators using equation 1.69 the page before.
Now, if we take a look at equation 1.101 on page 24, they write the potential energy operator V in momentum space, but notice how they do not make the same rigourous transformation of the creation/annihilation operators, but merely substitute ν with k in equation (1.62) in their indices.
My question is, why they do not make that rigourous transformation in the case with k, but only change the indices of the operators. Can you shed some light on this?
I will appreciate any help you can give me.
Niles.