12 questions linked to/from Why are there e.m. vacuüm fluctuations?
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Heisenberg energy uncertainty [duplicate]

I am biologist and just new to the field of quantum mechanics and trying to understand the subject by reading. It is said that virtual particles are created due to the uncertainty of energy when ...
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Uncertainty principle in quantum field theory

Can the uncertainty principle be derived in quantum field theory? If yes, does is have a different interpretation than quantum mechanics because the coordinates $x_i$ are now parameters and not ...
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Confusion in understanding of quantum fluctuations and vacuum energy [duplicate]

I'm having a bit of trouble understanding what exactly is meant by a quantum fluctuation of a quantum field and its relation to the vacuum energy attributed to such a field. Is the point, that due ...
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How Uncertainty Principle, Vacuum fluctuations and Energy Conservation coexist in QFT?

Recently I had a debate about the uncertainty principle in QFT that made me even more confused.. Because we use Fourier transforms in QFT, we should have an analogue to the usual Heisenberg ...
373 views

Virtual Photon in Electron Scattering Feynman diagram [duplicate]

If we know that the virtual photon emitted in an electron scattering Feynman diagram violates the energy and momentum conservation laws (though temporarily), why do we accept it as a feasible diagram ...
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Do virtual particles pop in and out of existence in the space just outside the nucleus? [duplicate]

This question is similar to one asked if virtual electrons exist outside the nucleus, but please note, my question says virtual particles. It is not a duplicate. I read so often that matter is mostly ...
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Understanding QED vacuum polarization

QED makes predictions about the polarization density of the vacuum based on the presence of virtual e-p pairs, which has a screening effect on the bare charge of the electron (which is infinite). My ...
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Do the virtual particles have any mathematical meaning in vacuum in absense of real quanta? [duplicate]

I have edited this question with its title. Virtual particles, as I understand, arise as intermediaries in the calculations describing interactions such as scattering between real particles and in ...
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