Does information work at the deep levels of physics, including quantum theory, undergirding the fundamental forces and particles? But what is the essence of information—describing how the world works or being how the world works. There is a huge difference. Could information be the most basic building block of reality?Okay, but he is challenged for a proton, and says that a proton is fully described by 50-60 bits for its location in the universe, and 1 bit for spin up or down.
Seth Lloyd is a professor of mechanical engineering at the Massachusetts Institute of Technology. He refers to himself as a “quantum mechanic”.
What? The diameter of the observable universe is about 4x1028 cm. So that is about 6x1084 cm3 in volume, so it would take that many bits to specify location to the nearest cubic cm.
A cubic cm is a lot of space for a proton. We need at least 100 bits to specify a proton location to some small region. And the universe could be bigger than what is observable.
But that is not my issue here. The proton could have velocity. Need many more bits for that.
And spin is not just one bit. Spin could point in any direction, not just up or down.
None of these proton parameters can be specified precisely, because of Heisenberg Uncertainty. A proton can have a wave function, and not position and momentum at the same time. So how many bits are needed for a wave function?
But then the wave function is not even real, so I don't know if it makes sense to ask how many bits are needed for a wave function.
So if a proton is equivalent to some number of bits of information, I don't know how to calculate that number. Lloyd is underestimating them.