On 20 Nov 2014, at 19:10, Richard Ruquist wrote:
On Thu, Nov 20, 2014 at 10:50 AM, Bruno Marchal <marc...@ulb.ac.be>
wrote:
On 20 Nov 2014, at 01:03, Russell Standish wrote:
On Wed, Nov 19, 2014 at 11:06:47AM -0500, Richard Ruquist wrote:
The collapse hypothesis is correct if we need to conserve the total
energy
and information in the universe.
Richard
Wavefunction collapse creates information, it does not conserve it.
Conserving information is equivalent to demanding unitarity of
evolution. Wave function collapse is non-unitary.
Exactly. It is the advantage of the "many-worlds". The evolution of
the universe/multiverse is a unitary transformation in the
configuration space (the Hilbert space). It is deterministic,
reversible, and let the probabilities and the information invariant.
It is also local. And it explains why the memories of the observers
contains appearance of indeterminacy (in a way coherent with
computationalism that Everett assumed), non-locality,
irreversibility, etc.
Like you say: the collapse, if it was a physical phenomenon, would
just contradict QM. The collapse is really an axiom saying that QM
is false when observers do measurement. But this has never been
successfully clarified, imo.
With a sufficient number of observations/measurements the entire
wave function is mapped out on the detector screen.
Locally, I mean in your branch of the universal wave (say). But the
number of branch is the same, in the differentiation (as opposed to
splitting) view.
Therefore experimental measurements verify QM. It seems we live in
an energy conserving but non-unitary, information-creating universe.
It seems, yes. In our branch. But not in the physical reality as a
whole, where information and energy are constant, and arbitrary I
would say.
Bruno
Richard
Bruno
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