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## Main Question or Discussion Point

I have a fairly straightforward question: how does one formulate the problem of hydrogen atom with quantum field theoretical treatment?

I understand that one can just take Uehling potential and find approximately the bound states' energies and wave functions, but it would not make electron field second quantized! So how to formulate and solve the problem with all fields involved (photonic and electron) second quantized?

Thanks.

I understand that one can just take Uehling potential and find approximately the bound states' energies and wave functions, but it would not make electron field second quantized! So how to formulate and solve the problem with all fields involved (photonic and electron) second quantized?

Thanks.