On 24 Nov 2014, at 11:35, Richard Ruquist wrote:
On Mon, Nov 24, 2014 at 4:05 AM, Bruno Marchal <[email protected]>
wrote:
On 23 Nov 2014, at 18:11, Richard Ruquist wrote:
Bruno: I doubt a photon needs to double his energy to go through
two slits
Richard: You should be ashamed
That's hardly an argument.
Agreed
Einstein already understood that if the collapse was a physical
phenomenon, and if special relativity was correct, then locality
would make a wave possibly collapse on two different eigenvector,
like sometimes finding literally the photon going in both hole. In
that case, the energy would be double, and the schroedinger
"diffusion" of the wave could be used to ... create energy. A
quantum perpetual machine could be constructed, and, pace George
Levy, but following John Clark's quote of Eddington, we can stop
here ...
Yes. I like Einstein's single pinhole thought experiment the best.
The incident photon spreads in spherical waves beyond the hole from
ray optics. So if waves could carry energy, the energy density
would drop by 1/r^2 where r is distance from the hole.
If we wrap the experiment with a spherical detector sheet, the
energy density incident on the sheet would be a constant across the
spherical sheet and the amount incident on any detector would be a
fraction of the photon energy. So there is not enough energy
incident on any detector to make a photon of the original energy.
That's classical thinking and it is wrong.
With MWI thinking, every detector will detect a photon at the same
energy and frequency as the original photon but in a different
world. So the total energy in the multiverse will locally have
increased by the number of detectors times the photon energy. The
only way to conserve energy is to detect only one photon of the same
energy and frequency as the original photon.
... or the conservation of energy is something which has to be
accounted in branches, not in the multiverse.
But the collapse is not physical, it belongs to the mind of the
people, fungible and then differentiated, in the infinite tensor
product, which, with computationalism, should be a mirror of the
fact that we are indeterminate on infinitely many sigma_1 sentences,
where the ortholattice structure is determined by the logic of self-
reference.
My opinion is that collapse is what makes objects physical.
That is my opinion too. But the collapse is a psychological
phenomenon, making directly the physical into something psychological.
Everything else is just math (and deterministic.) So everything that
could possibly happen can be computed ahead of time in a block 4
dimensional muliverse that I call the Math Space........ With
collapse, the physical space becomes lines in the Math Space. That
is not an argument. It is just how I see reality.
OK.
For a computationalist (who thinks), the collapse is not real, but
the wave is not real too. It is itself the product of a Moiré effect
on all computations.
I agree. With computationalism nothing is real except the math. All
is illusion- maya. So comp must have the support of Hinduism and
Buddhism.
And christianism before the 5th century, and judaism and Islam, before
the 11th century. The obsession with matter came later. I find this
weird, because there are no evidence for it.
I prefer to think that both quantum waves and particles are real,
but that waves are math objects and particles are physical objects.
Again that is not an argument..
My argument is that the block multiverse, if it were to become
entirely physical as MWI poses,
Not necessarily. In fact comp offers a compromise between the idealist
(the quantum describes only information) and many-worlds, by
introducing the idea that reality is the many-dream aspect that
arithmetic got when seen from inside. Of course, both the idealist and
the MW are not satisfied, and in science, we still kill the diplomats.
would require a nearly infinite amount of energy to exist, and more
and more as time goes on. That of course is impossible. So MW
reality must be illusion.
Unless energy is an illusion.
Another way to look at it is that conservation of energy comes from
Noether's time symmetry. But there is no need for time in a block
multiverse. So there is no need for the conservation of energy.
Conservation of energy is still an open problem in computationalist
theology. But the logic of self-reference seems to be capable of
explaining it, by imposing reversibility and linearity at the sigma_1
bottom (the global indeterminacy domain of the first person).
The alternative is some kind of mathematical wave collapse to
conserve both energy and quanta, which fortunately results in a
unique reality where time matters.
From the first person point of view.
I have suggested that if the wave has BEC entanglement properties,
that collapse may be instantaneous.
Except for being macroscopic state, I am not sure why BEC entanglement
is so special.
But that collapse mechanism uses experiment-derived properties
rather than math for lack of any time dependence.
You can elaborate on this, as I am not sure to follow.
Bruno
Richard
Bruno
On Sun, Nov 23, 2014 at 11:48 AM, Bruno Marchal <[email protected]>
wrote:
On 23 Nov 2014, at 12:32, Richard Ruquist wrote:
Yes, and as the branches multiply, so does the energy.
I doubt this, but eventually this will depend on how we define
energy. I doubt a photon needs to double his energy to go through
two slits, and I doubt Shor algorithm needs energy to handle 10^500
parallel superposition state. Energy is a local relative (gauge)
notion, which I am not sure can be easily applied to the whole
configuration space, which energy can be put a zero.
Of course with computationalism there is only an arithmetical
reality, and all physicalness is a view from inside. All branches
of all computations including the one with oracle are run in the
arithmetical reality, and it is clear, imo, that energy is only an
internal relative notion. Of course we need to justify why the
reversible computations win the limit measure "game".
Bruno
On Sun, Nov 23, 2014 at 3:52 AM, LizR <[email protected]> wrote:
On 21 November 2014 23:07, Richard Ruquist <[email protected]>
wrote:
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.
Energy is not constant in the MWI multiverse.
Energy is not constant in a general-relativistic universe.
I believe energy is approximately conserved within a branch of the
multiverse, in the MWI view? The "approximately" being because
branches are only approximately defined?
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