Real particles gets replaced by virtual ones all the time?

Question

If virtual particles arises all the time, everywhere, wouldn’t an virtual electron-positron pair arise near an real electron; the virtual positron annihilate the real electron (as opposed to the virtual one), then the virtual electron takes the place of the real electron and becomes real itself?

Thus what is more permanent in a sense are the quantum information of the electron, as the electron which replaces the old one very quickly gets replaced itself. And in quantum physics, we calculate and represent these fundamental particles via their quantum information, it’s not possible to tag individual electrons to see if they appear or disappear very rapidly to see if they get replaced by virtual electrons all the time.

So is this possible that real particles get replaced all the time, but we wouldn't know any better? (No way to tell from experiments.) Or is there a real effect which we can calculate if they interact like this? If they do not interact like this, what's preventing this interaction? What conservation law or laws of physics is preventing this seemingly logical, should happen interaction?

P.S. take note that I am not referring the the middle part of Feymann diagram when I said virtual particles, but specifically pair production virtual particles which interacts with a real one.

Answer 1

If you mean the representation of the vacuum as loops of annihilating particle antiparticle pairs, the basic rule which does not allow any real four vectors for these particles is conservation of energy.

These loops are important for corrections in interactions when there are incoming four vectors and outgoing four vectors, and yes, they are important corrections to the calculations. They are also used in the Casimir effect so there is a measurable effect.

And in quantum physics, we calculate and represent these fundamental particles via their quantum information

Not really, we use quantum field theory which is a system where all the particles in the particle table fill the whole space time with a field,an electron field, a neutrino_electron field etc, and creation and annihilation operators generate the particles. They act on the fields, which mathematically are the plane wave solutions of the corresponding differential equations, Dirac for electrons, and the operators are differentials operating on the plane waves. It is the calculation system which the Feynman diagrams economically represent and lead to calculations of scattering interactions and decays.