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Results tagged with quantum-electrodynamics
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user 206319
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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Quantization of free EM field, doubt about the field operators?
this is the first time that I study fields quantization and in particular I'm starting with the free em field. Previously I've just studied the non relativistic, Schrodinger equation for a non zero ma …
- 1,978
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3
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Schrodinger equation for free EM field
The question come from the fact that I've seen for the first time in my life the quantization of a field, in particular of the free em field.
I've study how it is possible to write the energy of the …
- 1,978
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Vacuum energy from the quantization of the electromagnetic field
I'm studying the quantization of the free electromagnetic field and at a certain point there is the Hamiltonian operator as:
$$\hat{H}^f_{em}=\sum_\lambda\frac 1 2 (\hat{P}^2_\lambda+\omega_\lambda^2\ …
- 1,978
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Why can we associate the rotation operator for a vector field to the angular momentum operator?
I've seen the operator that rotates a scalar field and its properties. Considering that the wave function of a particle (if I don't consider the spin) is described by a scalar field and that this oper …
- 1,978