The Black Hole of Quantum Computing

Standard Quantum Mechanics StdQM based on a multi-dimensional Schrödinger Equation SE is viewed to have exponential digital computational complexity effectively making SE uncomputable even on super-computers and thus useless for digital modeling of atoms/molecules in practice.

Quantum computing is an attempt to model atoms and molecules instead by analog computation performed on quantum computers capable of meeting exponential complexity. A quantum computer models a physical quantum system of atoms/molecules not by SE, but by another (simpler) physical quantum system which is controllable as being described by SE. 

A quantum computer thus offers a model/map of a real system which is itself a real system of the same form and type. The quantum computer model can be viewed as a 1:10 exact physical model of an airplane or ship with some details removed. The digital computational complexity of the original physical system is then irrelevant since no digital computation is performed, only a form of analog computation performed in a physical model of essentially the same computational complexity. 

Quantum computing thus represents a step back from the scientific revolution based on Calculus offering  mathematical models of reality of abstract symbolic from based on numbers which can be made alive by digital computing. 

Quantum computing throws away digital Calculus because it is found to be useless, and seeks a replacement which works in terms of analog computation. 

But is it possible that real quantum systems really perform analog computations of exponential complexity? If a digital computer does not have the capacity to meet exponential complexity, what says that a real system as it evolves somehow can express exponential complexity? 

We know that the exponential complexity of SE comes from the multi-dimensionality of the wave function representing possibilities rather than actualities. But real systems do not realise all possibilities only a few actualities, and so the computational complexity of SE as model is much bigger than the complexity of what is modeled. The model/picture totally swamps the origin and so asks for infinite digital computational power to no avail as concerns the origin.

RealQM is a version of the quantum mechanics of atoms and molecules, which is digitally computable and so does not need quantum computing.