So, do vacuum fluctuations exist?

[davidge]

I'd like to know the reasons many physicists support the existence of quantum vacuum fluctuations.

It seems that QED doesn't predict such phenomenum, nor any experiment has undoubtedly confirmed it, at least on the grounds of QED.

 

[Grinkle]

Start here ...

https://www.physicsforums.com/insights/vacuum-fluctuation-myth/

 

[davidge]

How does that affects famous theories like multiverse theory (which supposes quantum fluctuations)?

 

[PeterDonis]

@davidge, please read the insights article linked to, and its accompanying discussion thread, which can be found in full here:

https://www.physicsforums.com/threads/the-vacuum-fluctuation-myth-comments.892500/

A key takeway from that article and discussion is that "vacuum fluctuations" is a vague term. That means your questions and statements in this thread do not have a well-defined meaning. So they can't be discussed in the form in which you are stating them.

If you want to discuss a precise question involving quantum field theory, you can start a new thread in which you state a precise question; that means you either should not use the term "vacuum fluctuations" at all, or you should make clear exactly what it refers to in the math of QFT.

In the meantime, this thread is closed.