Linked Questions

3
votes
1answer
5k views

Deriving Coulomb's law from quantum electrodynamics [duplicate]

Is it possible to derive the Coulomb's law using the principles of quantum electrodynamics? How?
3
votes
2answers
407 views

How can photons cause charges to attract? [duplicate]

Photons are the force carrier of the electromagnetic force. I do not see how this could result in a transfer of momentum that attracts objects together.
0
votes
1answer
38 views

Is the quantum analogue of electrostatic field photon? What will be its wavelength then? [duplicate]

When two charges are separated there is an electrostatic field between two. Quantum mechanically, is it actually the discrete energy packet or photons that's travelling from one charge to another? If ...
2
votes
0answers
26 views

Quantum mechanical photon exchange [duplicate]

Background: While trying to understand the Standard Model I stumbled on a paper that explained it in very simple terms. I recognized that I don't even understand the quantum mechanical way of the ...
27
votes
3answers
12k views

The exchange of photons gives rise to the electromagnetic force

Pardon me for my stubborn classical/semiclassical brain. But I bet I am not the only one finding such description confusing. If EM force is caused by the exchange of photons, does that mean only when ...
23
votes
3answers
940 views

Can virtual particles be thought of as off-shell Fourier components of a field?

I just found this blog post, which gives an interpretation of virtual particles I haven't seen before. Consider a 1D system of springs and masses, where the springs are slightly nonlinear. A "real ...
5
votes
5answers
730 views

Why does an electron react differently to a virtual photon in the interaction between two electrons and between an electron and a positron?

For the interaction between, say an electron and a positron, there correspond many (infinite) Feynman diagrams with well described mathematical expressions for the incoming and outgoing particles and ...
10
votes
2answers
3k views

Is the force carrier of the magnetism in a common household magnet a photon?

As I have understood it, the Standard Model includes particles that carry the different forces, e.g. the electromagnetic (EM) force, the gravitational (G) force. When talking about EM fields such as ...
5
votes
1answer
2k views

What is the QFT picture of a static electric field?

Accelerating charge generates electromagnetic waves and loses energy, in QFT terms it emits photons that carry it away. What of a static charge? Moving photons are usually associated with waves, which ...
3
votes
2answers
1k views

Principle of superposition and QED

For finding a net force on a charge when it is in influence of many charges we simply do vectorical addition of all individual interaction of that charge with others. That's what is principle of ...
1
vote
3answers
1k views

How does the Electric Field create a force? [closed]

If we have 2 charged particles which are a certain distance away from each other, they either attract of repel due to the electric field created by both of them. But I don't understand the mechanism ...
2
votes
1answer
200 views

How is the EM force exchanged over long distances?

The Situation Imagine we place two charged objects a very far distance apart, essentially making them point charges. How does the EM force interact between the two point charges if virtual photons ...
1
vote
4answers
417 views

How can fields interaction give rise to particles?

We say light a matter-wave, meaning along with its wave property it shows particle nature. But how can fields interaction (electric and magnetic) give rise to particles (photon)? I wish someone could ...
3
votes
1answer
279 views

Is virtual particle the same thing as force particle?

Is virtual particle the same thing as force particle? Which of the above categories do photon, graviton and gluon fall into? Virtual particle, force particle, or both?
1
vote
1answer
112 views

How does meson exchange work within large nuclei?

I read the Wikipedia page on Mesons and it mentioned that there both charged and uncharged Mesons that decay into neutrino/electrons and photons, respectively. Unfortunately it didn't elaborate on ...

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