From: jos.bergervoet@xs4all.nl   
      
   On 3/13/2017 5:42 AM, Roland Franzius wrote:   
       ...   
     ..   
   > The tragedy of the Bohr model continues if one is trying to test   
   > the Schrödinger model for the Helium atom with four particles.   
   >   
   > In the Helium atom there are no symmetries at all and no modelling   
   > idea fits the exactly measurable spectral data in an acceptabe   
   > precision until the day before yesterday.   
   >   
   > The areas of atomic and nuclear states and molecular binding present   
   > a completely unsolved or unrelated bunch of stories of n-particle   
   > entanglement mechanisms.   
   >   
   > The simulation exceeds any computer capacity conceivable even in   
   > the times of the intelligent cloud.   
      
   For the more complex cases this might be true, but where   
   "nuclear states" refers to the simple baryons like the   
   proton and neutron, they can quite accurately be modeled   
   by today's lattice calculations, I think within 1% for   
   the energy levels.   
      
   And of course for the atomic states, it just depends on   
   how far you go beyond Hydrogen and Helium (and what   
   accuracy you then still want to obtain). In fact people   
   can call it a "simulation" regardless of that, which is   
   one of the problems..   
      
   --   
   Jos   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)