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Results tagged with quantum-electrodynamics
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user 93665
Quantum electrodynamics (QED) is the quantum field theory believed to describe electromagnetic interaction. It is the simplest example of a quantum gauge theory, where the gauge group is abelian, U(1).
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Electromagnetic field strength tensor fermion couplings
The electromagnetic field strength tensor, $F_{\mu\nu}$, contains the electric and magnetic fields as its components. In that case, would one be able to use $F_{\mu\nu}$ to describe specifically the e …
- 357
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Interpretation of the electromagnetic field strength tensor as a spin-1 field
If I understand correctly the electromagnetic field strength tensor $ F_{\mu\nu}$ could be considered as a spin-1 field. In that case, what can one say about the total spin and the $z$-component of th …
- 357
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QED Lagrangian in terms of Weyl spinors
Let's say the electron field can be written in term of its left and right handed Weyl spinors:
\begin{equation}
\psi_{e} = \begin{pmatrix} \chi \\ \eta^{\dagger} \end{pmatrix}
\end{equation}
In whic …
- 357
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Lagrangian for electron radiating a photon
I know the electron-photon interaction Lagrangian from QED: ($-ie\bar{\Psi}\gamma^{\mu}A_{\mu}\Psi$). However, this interaction seems to describe the interaction of electron and positron with a photon …
- 357
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Single chirality electron and photon interaction
I asked a similar question about QED Lagrangian but I guess the question wasn't clear enough since I didn't get any correct answers. So, I'll try to ask the question in a different way: how does one w …
- 357