We can calculate the Lamb-shift in two ways. In order of zero point oscillation in QFT or in order of perturbation done by virtual particles in QED.(adsbygoogle = window.adsbygoogle || []).push({});

We can calculate the Casimir-Force in two ways. In order of zero point oscillation in QFT or in order of perturbation done by virtual particles in QED.

So in what way are zero point oscillations of the electromagnetic field and virtual photons the same. I mean virtual photons as vacuum fluctuations, i.e. vacuum bubbles.

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# I need the difference

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