On 11/12/2017 12:21 pm, smitra wrote:
On 11-12-2017 00:55, Bruce Kellett wrote:
What you have to do if you want to claim that all chance outcomes are
of quantum origin is compare the relative magnitudes of quantum and
thermal fluctuations at room temperature -- room temperature because
that is where we do the experiments. And you haven't done that;
neither has Albrecht in the paper you reference. That is why his paper
is a load of nonsense.
Thermal fluctuations do not need to be eliminated, as they are of pure
quantum mechanical origin. However, if one has to argue about that
then one loses the point of the proposed experiment. At absolute zero
the thermal fluctuations are due to zero point motion, take e.g. the
harmonic oscillator which then has an energy of 1/2 hbar omega.
In generic non-integrable systems you'll have chaotic behavior where
small perturbations grow exponentially.
Not necessarily. It depends on the relevant Lyapunov exponents. The mean
speed of molecules in a gas does not grow exponentially.
Thermal fluctuations will then originate from quantum fluctuations.
Why then are thermal fluctuations temperature dependent? But be that as
it may, thermal fluctuations, and the random motions of molecules in a
gas, say, are not coherent, and there are no interference effects
between the molecules of a gas. Consequently, whatever their origin, the
motion is manifestly classical at room temperature.
Bruce
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