On 8/7/2019 10:13 PM, smitra wrote:
No disagreement with that, but my point all along is that "many
somethings" associated with the qubits in the quantum computer, can
lead to many minds which can have many experiences, when the quantum
computer executes computational traces which create conscious states.
Do you disagree with this?
No. As far as I know minds are classical like processes in brains.
That's why you are never really "of two minds". Superpositions
corresponding to neurons firing and not-firing decohere far too
quickly. See Tegmark's paper.
Classical objects do not exist in this universe that works according
to quantum mechanics. What happens is that due to decoherence
macroscopic properties of objects behave as if they are described by
classical mechanics, and Tegmark has shown that this is also true for
brain processes. This only debunks the idea that a normal computer
could never be conscious as e.g. Penrose has claimed. But because
everything is still quantum mechanical, a brain observing the
z-component of a spin that is polarized in the x-direction will still
end up in an entangled superposition with the spin and the local
environment. The brain consist of atoms and the many particle
wavefunction of all the atoms in the brain and the environment will
evolve according to the Schroedinger equation.
Saibal
True. But there are two entanglements with the environment (including
Wigner) which are orthogonal and cannot interact. I realize this is
statistical mechanics type phenomenon, i.e. it depends on there being
many degrees of freedom. But I think there must be a lower bound on
non-zero probabilities, possibly imposed by cosmological
considerations. So the density matrix must become strictly diagonal in
some basis. This is the same as "some things happen and some don't".
Brent
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