How Quantum Mechanics Could Be Even Weirder
Rather, the classical world emerges from the quantum in a comprehensible way: you might say that classical physics is simply what quantum physics looks like at the human scale.
.. Erwin Schrödinger, who invented the quantum wave function, discerned at once that what later became known as nonlocality is the central feature of quantum mechanics, the thing that makes it so different from classical physics.
.. Arguably it’s better to forget this picture of cause-and-effect: you could say that two entangled particles aren’t really two particles at all, but have actually become one single, nonlocalized quantum entity.
.. Given their super-efficiency, PR boxes could do computation even faster than quantum computers. Could they ever exist, though? Sure, the world looks quantum-mechanical, not super-quantum; but it also looked classical for a long time, until we figured out how to spot quantum nonlocality.
.. The question becomes not so much why nature isn’t completely classical, but why it’s not “more” quantum.
.. All this fits with a growing conviction among many physicists that quantum mechanics is at root a theory not of tiny particles, but of information.