Monstrosity of Quantum Mechanics 4: Quantum Computers

The belief of the modern physicist that the linear multi-dimensional Schrödinger equation

describes the quantum world of atoms and molecules, has led to the idea of the quantum computer:

• device for computation that makes direct use of quantum mechanical phenomena, such as superpositionand entanglement, to perform operations on data.
• Experiments have been carried out in which quantum computational operations were executed on a very small number of qubits (quantum bits).
• Government and military funding agencies support quantum computing research to develop quantum computers for both civilian and national security purposes, such as cryptanalysis.

I have noticed in previous posts that the linear multi-dimensional Schrödinger equation is a monster, which cannot be solved, not even on any thinkable supercomputer with any thinkable known microprocessor technique. The dimensionality is simply overwhelming.

We have noticed that the impossibility of solving the multi-dimensional Schrödinger equation

results from the fact the equation describes all possibilities rather than specific actualities, which is overwhelming for microprocessors limited to performing computations on specific data.

The Schrödinger equation is thus a monster computationally, and to handle such a beast a monster computer is needed, a computer which computes all possibilities rather than specific actualities, which computes on all data rather than on specific data: In other words a quantum computer is needed.

Are there any quantum computers? No, only with a few quantum bits.

Is it possible to construct a quantum computer? Nobody knows. Few seem to believe one can.

Does the multi-dimensional Schrödinger equation give a realistic description of the atomic world? Nobody knows because solutions cannot be computed and compared to experimental observation.

Can you solve a monster equation on a monster computer, that is a device which simulates a real analog monster by being a real digital monster?

What if the multi-dimensional Schrödinger equation is just an invented fictional monster, which will disappear as soon you stop talking about it?

Compare with the post today on The Reference Frame singing praise to the Copenhagen Interpretation of the multidimensional Schrödinger equation, as if it has a meaning. Read yourself and ask if you understand anything.