Schrödinger's intention was that his cat analogy serve as a criticism of the notion of a particle being in a superposition of states. Once again the supporters of the Copenhagen interpretation hi-jacked the criticism and used it to support the notion. The theory underlying quantum computers is this unsound notion. Superposition is a quality unique to waves, for example several vibrations overlapping each other and causing an interference pattern. So it is not surprising that after several decades quantum cats and quantum computers remain chimeras.

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Einstein’s criticism of the Copenhagen interpretation, detailed in a 1935 paper he co-authored with Podolsky and Rosen and commonly referred to as the EPR paper included a thought experiment which involved the position and momentum of two particles and how these quantities could be determined. His thought experiment morphed into one involving 'spin' and a theory of entangled particles that could communicate faster than the speed of light, and this along with experiments conducted with photons and orientation, were used to support the idea of 'spooky action at a distance' which Einstein repudiated and which can be shown to be unfounded.

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Atomic spectra was used to support the idea that electrons can jump between energy levels or ‘stationary states’ in the atom. Schrödinger rejected this and thought a more natural explanation was to view the electron as a standing wave changing frequencies. The notion of the ‘spin’ of an electron was an example of mathematical expediency at work, rather than anything physically real.

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