Thank you for your explanation.
However I do not understand how it is not possible to measure something of a Dirac spinor in relativistic QT. In that theory, the 4 component Dirac spinor represents the wave function of the electron and it should be possible to measure spin (among other things)...
Hello,
I would like to ask about the process of measuring the Spin of a Dirac 4-spinor Ψ that is not in the rest frame.
Note that even though there is plenty of information about what a Dirac spinor is, what reasoning lead to its discovery and how it can be expressed in terms of particle and...
Thank you very much for your answer, it is clear to me now that some handwaving is indeed necessary for the path integral in QFT.
With regards to your first paragraph I understand that since operators ##\phi## and ##\Pi## evaluated at ##(x,t)## behave just like operators ##\hat{x}## and...
Recently I have reviewed by reference books to get a better understanding of the fundamentals of QFT and there is one thing I still do not understand. In the QFT derivation of the path integral formula, it seems that every book and online resource makes the assumption that for the field operator...
Thank you very much for your answer.
Unfortunately I still do not understand why the pair cannot be in a |10> orbital state. According to Clebsh-Gordan coefficients, |00> = C1*|11>*|1-1> + C2*|10>*|10> + C3*|1-1>|11>, where the first |xy> state in |xy>*|ab> is the orbital wavefunction and |ab>...
Homework Statement
I have a question regarding exercise 48.4-b in Srednicki's QFT book (the chapter is related to Yukawa theories). I have the official solution + explanation to the problem but I still do not fully understand the reasoning used in it, so perhaps you can help me.
In the...