My argument for the impossibility of quantum computers lies within the scope of quantum mechanics and does not deviate from its principles. In essence, the argument is based on computational complexity and its interpretation, and it is discussed in-depth in my papers which also include a discussion of general conclusions that derive from my argument and relate to quantum physics, alongside suggestions of general laws of nature that express the impossibility of quantum computation.Note that he does not say that quantum mechanics is wrong. He denies that quantum computing is a necessary consequence.
My argument mostly deals with understanding quantum computers on the intermediate scale (known as NISQ computers, an abbreviation of Noisy Intermediate Scale Quantum), that is, quantum computers of up to at most several hundreds of qubits. It is expected that on this scale we will be able to construct quantum codes of a quality sufficient for the construction of bigger quantum computers. It is further expected that on this scale the quantum computer will achieve computations far beyond the ability of powerful classical computers, that is, will achieve quantum computational supremacy. The Google’s Sycamore computer is an example of a noisy intermediate-scale quantum computer.
As specified later, it is my argument that NISQ computers cannot be controlled. Hence:
- Such systems cannot demonstrate significant quantum computational advantage.
- Such systems cannot be used for the creation of quantum error-correcting codes.
- Such systems lead to non-stationary and even chaotic distributions.
A lot of smart people and a lot of research funding say that he is wrong.
Maybe I am just a contrarian, but it seems to me that they should have been able to prove him wrong by now. They have not.