Re: How real are the "Virtual" partticles?
From: Arnold Neumaier (Arnold.Neumaier_at_univie.ac.at)
Date: 03/15/05
- Next message: Jay R. Yablon: "Mass Term Gordon-Like Magnetic Moment Decomposition"
- Previous message: Jon Bell: "Re: recommendation for college physics textbook"
- In reply to: Eugene Stefanovich: "Re: How real are the "Virtual" partticles?"
- Next in thread: Eugene Stefanovich: "Re: How real are the "Virtual" partticles?"
- Reply: Eugene Stefanovich: "Re: How real are the "Virtual" partticles?"
- Messages sorted by: [ date ] [ thread ]
Date: Tue, 15 Mar 2005 18:22:03 +0000 (UTC)
Eugene Stefanovich wrote:
> Igor Khavkine wrote:
>
>>There is absolutely no relation between bare particles and what are
>>called "virtual particles". The latter are simply not particles, they
>>are squiggles on paper.
>
> There is a relation. When you draw a real electron in QED you first draw
> a line corresponding to a "bare" electron. Then you add lines of virtual
> photons that begin and end on the bare line. Then you add small
> virtual electron-positron loops to the virtual photon lines, etc.
> So, loosely speeking, in QED real electron = bare electron + coat of
> virtual particles.
Not 'in QED' but only 'in standard perturbative QED'.
One can do QED in many ways, and depending on how it is done,
what is virtual is very different. In NRQED, which is the version
of QED used for high agguracy calculations of the Lamb shift
(and hence responsible for the supreme trust in QED),
there are no virtual particles at all.
Arnold Neumaier
- Next message: Jay R. Yablon: "Mass Term Gordon-Like Magnetic Moment Decomposition"
- Previous message: Jon Bell: "Re: recommendation for college physics textbook"
- In reply to: Eugene Stefanovich: "Re: How real are the "Virtual" partticles?"
- Next in thread: Eugene Stefanovich: "Re: How real are the "Virtual" partticles?"
- Reply: Eugene Stefanovich: "Re: How real are the "Virtual" partticles?"
- Messages sorted by: [ date ] [ thread ]
Relevant Pages
|
