Heck, we know nothing about this class yet related to non quantum classes!
  • conjectured not to intersect with NP-complete, because if it were, all NP-complete problems could be solved efficiently on quantum computers, and none has been found so far as of 2020.
  • conjectured to be larger than P, but we don't have a single algorithm provenly there:
    • it is believed that the NP complete ones can't be solved
    • if they were neither NP-complete nor P, it would imply P != NP
  • we just don't know if it is even contained inside NP!