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philipp_w
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Currently I am working through a script concerning QFT. To introduce the concept of canonical filed quantisation one starts with the (complex valued) Klein-Gordon field. I think the conept of quantising fields is clear to me but I am not sure if one can claim that the equations of motion for the field operators have to fulfil same equation as the KG field does.
Mostly this is done in textbooks by pure calculating (see Peskin/Schroeder sec. 2.4). Is this somewhat of luck or this is not everytime the case that fieldoperators do not fulfil the equations of motions of their corresponding (classical) fields?
Or is it always allowed to demand the same equations of motions as the fields would fulfil?
(look here
http://theorie.physik.uni-giessen.de/~hees/publ/lect.pdf
formula 3.72)
maybe someone understood what I was trying to say and has some help for me. thx
Mostly this is done in textbooks by pure calculating (see Peskin/Schroeder sec. 2.4). Is this somewhat of luck or this is not everytime the case that fieldoperators do not fulfil the equations of motions of their corresponding (classical) fields?
Or is it always allowed to demand the same equations of motions as the fields would fulfil?
(look here
http://theorie.physik.uni-giessen.de/~hees/publ/lect.pdf
formula 3.72)
maybe someone understood what I was trying to say and has some help for me. thx
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