The question of the possibility of quantum computers (QC)
ever being built is unclear Of the very large number of papers
published in the QC area, more are skeptical of the possibility of QCs
being built that are faster than classical computers than pro
QC papers. Some papers depend on interpretations of quantum
mechanics but some do not. Here is a paper giving a classical
algorithm that is faster than the Google PR algorithm for which
quantum supremacy was claimed (Reference: Pan, F., Chen, K. and Zhang, P.
"Solving the sampling problem of the Sycamore quantum supremacy
circuits", arXiv:2111.03011, URL:
https://arxiv.org/abs/2111.03011,
Nov. 2021)
I am working on a paper showing impossibility of quantum computing, but
it is not easy because there are so many papers skeptical of QC and there
is no objective peer refereeing because of the huge amounts being spent on
research and on company investments.