Not a physicist and only read the abstract, but that does not sound right. One frequently hears that one can recover classical mechanics from quantum mechanics

Not a physicist and only read the abstract, but that does not sound right. One frequently hears that one can recover classical mechanics from quantum mechanics in the limit of Planck's constant becoming zero but not even that seems to be [completely] true [1] as a quick search shows. The other way around, as this paper claims, seems even more unlikely. As they mention a couple of mathematical tools that went into this analysis, maybe they accidentally introduced the relevant differences between classical and quantum mechanics with them. Or maybe just reading the abstract is not good enough and they claim something different than what I think they claim after reading the abstract. If they actually claim that one can recover important aspects of quantum mechanics from classical mechanics without introducing additional concepts or assumptions, then I am highly skeptical. [1] https://physics.stackexchange.com/questions/32112/classical-limit-of-quantum-mechanics https://physics.stackexchange.com/questions/32112/classical-...