Linked Questions

3
votes
1answer
659 views

Are virtual exchange particles real or just mathematical? [duplicate]

When an electron exchanges a virtual photon with another electron or proton, is the virtual photon a real particle or just a mathematical construct? In string theory, the force carrier particles of ...
2
votes
1answer
61 views

Are there any other pairs similar to virtual and normal photons? [duplicate]

Are there virtual particles for every kind of particle there is?
0
votes
0answers
120 views

What is the difference between virtual photons and real photons? [duplicate]

I'm reading a book by Schewe and he describes the electron center as being a swarm of virtual photons. But how are they any different from actual (?) photons?
0
votes
0answers
64 views

Virtual Particles and Causation [duplicate]

Sometimes when people debate what type of cause a universe with a beginning may have Virtual Particles has been used as an example of a thing that can arise without a cause. So my question would be ...
38
votes
3answers
10k views

Are W & Z bosons virtual or not?

W and Z bosons are observed/discovered. But as force carrying bosons they should be virtual particles, unobservable? And also they require to have mass, but if they are virtual they may be off-shell, ...
23
votes
4answers
5k views

What actually are virtual particles?

What actually are virtual particles? In various places around physics SE, documentaries and occasional news headlines, I see the term "virtual particles", normally virtual photons. I have tried ...
16
votes
2answers
2k views

Virtual particles and physical laws

Recently, I was reading about Hawking Radiation in A Brief History of Time. It says that at no point can all the fields be zero and so there's nothing like empty space(quantum fluctuation etc.). Now, ...
7
votes
3answers
1k views

What makes a Feynman diagram real or virtual?

Simple question: as the title says, what makes a real Feynman diagram real, and what makes a virtual diagram virtual? Or in other words, how do I tell whether any given diagram is real or virtual? I'...
4
votes
3answers
2k views

Are there any other mechanisms that can make virtual particles 'real' other than Hawking Radiation and Universe Births?

As I understand it, if virtual particles do not recombine within the plank time they become 'real'. This is proposed to happen in Hawking Radiation, where one virtual particle crosses the black hole'...
0
votes
2answers
198 views

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 ...
1
vote
0answers
124 views

What determines the strength of electrostatic interaction from the view point of virtual photons? [closed]

OK,I have not studied any quantum field theory but ever since I heard of charges interacting by exchanging virtual photons I have been wondering what determines the energy of the virtual photons. ...
0
votes
2answers
156 views

Why EM wave generated by wiggling charge is real, not a virtual photon? [closed]

In electrostatics, charged particles attract or repel via exchange of virtual photons. But when charges wiggle (or more generally accelerate), they generate electromagnetic waves which are often ...
1
vote
2answers
121 views

According to Coulomb law, why do fixed charges interact, if they don't emit the photons?

Why does it happens, if fixed charges don't oscillate the em field?