On 2/16/2012 7:58 PM, meekerdb wrote:
But QM is consistent with some things (almost all big things) being
almost exactly classical. There is no reason to think our brains
depend on non-classical processes to perform computations (metabolism
- yes, computation - no). Certainly it would be a severe evolutionary
disadvantage if there were more than a just a little randomness in the
function of a brain.
Hi Brent,
"Almost is" does not equal "is". Sure, if we are considering
objects that have huge masses and thus have aCompton wavelength
<http://en.wikipedia.org/wiki/Compton_wavelength> that is almost beyond
the range of our ability to measure it, when we can get away with
thinking of them as "almost exactly classical"and thus FAPP is ok to say
that they are "classical". But we are not talking about Jupiter (the
planet), we are talking about the human brain and digital substitution
of its computational function. The human brain is not an homogenous mass
(pace Tegmark), it has lots and lots of very fine structure, structure
that is well within the range of having a large enough Compton
wavelength to make a difference what makes a difference about quantum
stuff.
Classical teleportation is, like classical substitution, simply a
pipe dream.
Makes no sense!? Being classical is exactly what allows teleportation
and functional substitution.
Does computational universality only works for objects that have a
Compton wavelength that is tiny? That is what you are in effect asking
us to believe.
Onward!
Stephen
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