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   sci.physics.research      Current physics research. (Moderated)      17,516 messages   

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   Message 15,516 of 17,516   
   Jos Bergervoet to SEKI   
   Re: Can We Believe in Modern Quantum The   
   08 Jan 17 10:27:58   
   
   From: jos.bergervoet@xs4all.nl   
      
   On 1/6/2017 5:05 PM, SEKI wrote:   
   > On Friday, January 6, 2017 at 1:07:04 PM UTC+9, Rich L. wrote:   
      ...   
   >> I think your basic misconception is that the wave function IS the   
   >> particle.  It is not.   
     [ .. ]   
   > I consider that the assumption that there exist extremely small   
   > elementary particles (regardless of whether point-like or string) in   
   > reality is false and is the root of quantum paradoxes such as   
   > instantaneous wave function collapse,   
      
   That seems reasonable. After all, the mathematics of QM   
   only describes the wavefunction, so why would we assume   
   anything else exists? All else is mythology!   
      
     ...   
   > I assume:   
   > - Though a quantum behaves as a wave, it maintains its oneness while it   
   >    exists.   
      
   A wave remains a wave, you presumable mean.. But of course   
   QM describes how single-particle wave functions sometimes   
   evolve into two-particle and subsequently perhaps into   
   multi-particle wave functions. So you have to describe   
   reality at all times with the proper set of N-particle   
   wave functions, one for each N, as QFT basically is doing   
   in Fock space.   
      
   > - A free quantum carries its energy and momentum as a whole.   
      
   Why focus on a "quantum"? The quantum is just the difference   
   between two levels, or two states, in QM. The states are the   
   real entities! A "quantum" could in classical physics be   
   the difference in position between two point particles. That   
   is *not* the building block of reality in that theory! The   
   point particles themselves are.   
      
   > - A quantum can assume the character of a particle, which is extremely   
   >    small, only momentarily.   
      
   Why do you believe it can? The mathematical description of   
   QM can of course describe a wave packet with a small size,   
   but that is probably not what you mean here. If the wave   
   is spread out, why do you believe it can suddenly be very   
   small? That sounds like the wave function collapse so here   
   you go back to the mythology!   
      
      ..   
   > In each quantum field, a kind of cohesive force like surface tension or   
   > some sort of cut-off mechanism is considered to be essential.   
      
   By whom is this considered to be essential? QM does not   
   describe any such cohesion. QM very clearly *denies* that   
   such a force exists. So this is considered essential only   
   by those who reject QM!   
      
   > [As an example, consider a photon traveling all the way from a far-away   
   > star.  Without any cohesive force or some sort of cut-off mechanism,   
   > the quantum cannot but diffuse,   
      
   Exactly the description by QM. That is how reality is!   
   If you believe QM. (I had hope that you did, when you   
   wrote that you rejected small point particles!)   
      
   ...   
   > [According to the traditional interpretation of quantum physics, one   
   > may assume that, as soon as the photon is detected, the existence   
   > probability of the photon completely vanishes at all points including   
   > those millions or billions of light-years away.   
      
   That's the mythology again. QM in its mathematical   
   formulation never described such an effect.   
      
     ...   
   > You may feel that the above arguments are quite odd, though I suppose   
   > that my interpretation of quantum mechanics is leastwise better than   
   > that of Copenhagen, many worlds theories and so forth.   
      
   What you do is *not an interpretation, it is a rejection*   
   of QM (at least of QM as it is formulated now) because you   
   want to add a non-linear cohesive effect (which destroys   
   the unitary time-evolution which is at the heart of QM!)   
      
   But my question is why you want any change. Why can't you   
   accept that the wave function is reality? (Or at least the   
   best approximation of reality that we currently know?)   
      
   --   
   Jos   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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