X-Message-Number: 22077
From: 
Date: Thu, 26 Jun 2003 10:45:10 EDT
Subject: Re: CryoNet  #22070 Infrared divergence

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From: "michaelprice" <>

> any QFT text book that
> discusses the infrared divergences will show that the real soft photon
> number is infinite.
> 

... If there was an infinite time for the reaction, what I said is that, in 
all practical ( real physical) cases, the time is finite and so the number of 
photons. If you disagree, then you have lost the infinite time condition 
somewhere in the QFT maths jungle.

>Sorry Yvan, your heuristic counter-argument amounts to no more than
>a restatement of the well known fact that energy eigen states are
>stationary states.  No heuristic argument based on the uncertainty principle
>can stand against the detailed calculations of quantum field theory, since
>the latter includes the former.  

Once more I disagree:Quantum Field Theories are not the end of the road, 

SuperSymetries for example are not QFT, and here the Heisenberg's principle 
holds 
too: So it is not a subelement of QFT. It is used by them and if you think QFT 
disprove the uncertainty principle, the simplest solution is that you have 
badly digested them, sorry Michael.

Yvan Bozzonetti.

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