On 04 Dec 2017, at 22:10, Brent Meeker wrote:
On 12/4/2017 8:34 AM, Bruno Marchal wrote:
On 04 Dec 2017, at 04:34, Russell Standish wrote:
On Mon, Dec 04, 2017 at 02:11:11PM +1100, Bruce Kellett wrote:
On 3/12/2017 9:03 am, Russell Standish wrote:
The point being that the uncertainty in the coin's initial
position is
itself due to the amplification of quantum uncertainty by
classical
chaos.
That may happen in some cases, but just looking at the numbers
says that
normal thermal motions will far outweigh the effect of any
residual quantum
uncertainty. In most cases where the Lyanpunov exponents lead to
classical
chaos, there is more than enough classical thermal uncertainty in
the
initial conditions so that any residual quantum uncertainty is
irrelevant.
But surely, classical thermal uncertainty is just due to
amplification
of quantum uncertainty by means of molecular chaos.
Indeed. Bruce seems to introduce a continuous collapse in the
picture. That classical thermal uncertainty can only augment the
number of terms of the superposition. It amplifies the chance of
getting a superposition of the outcomes.
But the fact that you can construct a coin flipping machine and you
can train yourself to flip a coin so consistently that it's outcome
is predictable implies that the neither the atmospheric thermal
perturbations nor the quantum fluctuations produce world splitting.
Of course. If you cheat!
That is why I insist you have to shake it seriously for some time, so
that you benefit from the mix of classical chaos and Heisenberg
uncertainty.
Bruno
Brent
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