- Aug 31, 2013--- In Fabric-of-Reality@yahoogroups.com, Gary Oberbrunner <garyo@...> wrote:
>

Please demonstrate this, by walking me through some arbitrary process starting with observed strangeness and ending up invoking a multiverse in order to prevent SWE collapse.

> On Sat, Aug 31, 2013 at 12:10 AM, hibbsa <hibbsa@...> wrote:

>

> > **

> >

> > > > Alan batted this away saying QM implied MWI not the other way

> > > > around. I did mention at the time I didn't think that a legitimate.

> > >

> > > You are correct in my view. MWI is only one interpretation of QM.

> > > But MWI is principally a mathematical theory -- we put words around

> > > that mathematical explanation to help tell the story. But the math

> > > _is_ the ground truth. (This bears on your other posting as well --

> > > all true scientific explanations are primarily mathematical.) You

> > > could say that MWI is more strictly mathematical than Copenhagen,

> > > since Copenhagen also postulates that quantum states collapse when

> > > observed, and it has no mathematical model for how and when this

> > > happens. MWI has no such mathematical inconsistency.

> >

> > Gary - MWI is not defined with a set of equations that I know of...do you

> > have a link?

> >

>

> MWI is *literally* nothing more than saying that the entities described by

> the Schroedinger Wave Equation represent reality. It rejects the "collapse

> postulate" (proposed as the reason there isn't more than one outcome for a

> given experiment, which is what the SWE says) and says that the results ofme

> that equation stand as written.

SWE is not literally what you say. It describes collapse events. The only way to fix things so it doesn't is with an infinite multiverse.

Why can't SWE in the raw describe reality, to include collapse events?

The rules governing whether you have to mention assumptions like say, determinism or local reality, are in terms of whether these assumptions causally influence the way things get defined and take as shape. If they do, then you'd have to enter into a process of abstraction and dependency elimation, such that a complete break was defined with all that, such that, now the multivers and SWE not collapsing are defined in temrs of some set of things that all become cancelled away.

It's got to real like that. You can't just turn around and drop massivelhy influential implicit assumptions, unless you massively get rid of the influences themselves.

Then there's the claim MWI is mathematical. This is only substantially true if you can show a set of equations, maybe SWE itself, that overwhelmingly capture the entire multivers conception, and also how it maps to individual QM events and all the rest. In other words, that we can say, going forward we are going to talk abiout MWI mathematically, using equations and consequences, and we care going to find that this a much more powerful way to work with MWI.

Are you making any of the above claims? I don't think so. I think we're stuck with verbal explanations of MWI. I don't think you would have much luck in any attempt to translate MW concepts like fungibility and all the rest, in some kind of intermediate structure that allowed full translastion between MWI and SWE and the rest of QM.

If you say different, I'm impressed. But then do it. Show me.> >

> > Perhaps you are attributing QM mathematics to MWI. Which IMHO would be

> > wrong, even if it was 'right' that you could do it. QM is parochial, thus

> > so is its mathematics.

> >

>

> Whoa, what do you mean by parochial? Do you mean QM doesn't apply

> everywhere? The Schroedinger Wave Equation is by far the best predictor of

> experimental outcomes we have ever seen, from the tiniest phenomena to the

> largest; from the lowest energies to the highest. Where do you think it

> fails to apply?

>

>

>

> > What I am talking about is a set of equations describing the multiverse

> > itself.

> >

>

> Well, of course one first has to decide for oneself if the multiverse

> exists, and what the term means, and so on. Tipler and others have a

> different concept. But assuming you mean the MWI which is a consequence of

> the Schroedinger Wave Equation, that multiverse is _by definition_ the one

> described by the SWE.

>

>

> > At least one falsifiable prediction would be possible as the consequences

> > of such a set of equations.

> >

>

> Sure! There are thousands. We run those experiments all the time, at

> CERN, through cosmology, satellite orbital predictions, and so on. So far

> the Schroedinger Wave Equation is still holding up well.

>

>

> > And that would be the prediction of how souls within individual universes

> > would experience the multiverse.

> >

>

> Now we get into different territory. The Copenhagen interpretation says

> that quantum superpositions "collapse" (producing only a single result)

> when "observed". See Schroedinger's Cat. CI says that the act of opening

> the box and observing the cat causes the state vector to collapse. This is

> weird. What is an "observer"? Does it have to be conscious? What about a

> video camera? Does the video camera stay in superposition til someone

> watches it? MWI sidesteps all of that by saying that what the SWE

> describes reality: the cat splits, the box splits, the observer/camera

> splits, and so on. It all happens by very well-defined means and there's

> no quantum weirdness. Specifically, there's no distinction between

> observers and observed, there's no special place reserved for conscious

> beings -- it's all just physics.

>

> And the SWE does accurately predict what conscious observers (or video

> cameras) will experience within a multiverse. Decoherence is a consequence

> of the equations. And in fact there are ongoing experiments now in

> preserving quantum superpositions of large nearly-macroscopic objects for

> longer and longer times, which is what the SWE (and MWI) predict, but not

> what collapse-based interpretations say would happen. (Google for "quantum

> superposition of macroscopic objects" for more.)

>

>

> > Now if the multiverse equations could predict, literally predict, the

> > precise form of Quantum Mechanics....or even go further and predict

> > macroscopic concepts like Space Time. Now that would describe the ascent

> > into Science of MWI. There would also be a Nobel or two in the offing.

> >

>

> I don't get it. How does it not? What's it missing? Maybe you're saying

> the SWE assumes the existence of spacetime. That is true. It explicitly

> takes the derivative of the wave with respect to time.

>

>

> > >

> > > > How do you feel about it? And how is the progress coming along?

> > >

> > > I'm an engineer. Not a scientist and certainly not a philosopher,

> > > except insofar as I care deeply about certain problems in those

> > > areas. And from that engineering point of view, the entire field of

> > > quantum computing, which is admittedly still small but is making

> > > (ahem) quantum leaps every year, does not really exist without a

> > > decent (non-Copenhagen) interpretation of QM.

> >

> > I don't understand the proposition of quantum computing very well. If it

> > involves using the superposition, then I would like to register a personal

> > prediction right here, that quantum computing won't ever happen on those

> > terms.

> >

>

> Well, it's already happening, sorry. Shor's algorithm (google it) has been

> run with up to 7 superposed qubits. (

> http://arxiv.org/pdf/quant-ph/0112176.pdf). Once we get up to 32 or so,

> using it routinely to break cryptographic codes will become possible. In

> fact if I had to bet, I'd bet that the US NSA is already well ahead on

> this, and just not telling. They have arguably the most to gain from

> quantum computing.

>

>

> > The reason I think that, is that from a perspective of QM as one side

> > something that the Big Bang becomes the other side, which is in fact

> > inherently a position that requires the 'bold conjecture' that our universe

> > came about by a process very much in analogue to Darwinian evolution (which

> > kicks off a process that inevitably requires the emergence out of the Big

> > Bang, as a 'development' or 'gestation' event, in that the actual evolution

> > of all this took place back through pre-Big Bang history, as a progression

> > starting with universes that flashed in and out of existence, to ones that

> > lasted a bit longer, to others yet more enduring, probably thousands or

> > millions of rounds, to get us here.

> >

> > I can't be arsed trying to ezplain why that is for now, but cross me

> > kippers hope to die, it comes out of a very hard set of constraints.

> >

> > So anyway...that would be a very basic level illustration of the reality

> > that I see, and in that reality QM never gets explained directly at all.

> > What happens instead is that QM equations, because they are so accurate at

> > predicting reality, becomes a surrogate for an empirically observable patch

> > of reality, which then - just exactly the same way that 18th century

> > chemistry came to be - that surrogate empirically observable landscape is

> > paired to an embryonic, highly vague, explanatory conception, in such way

> > that, the components of the conceptions can be played around with, until

> > some small prediction falls out about quantum level reality, which can in

> > turn be tested using that surrogate empirical landscape.

> >

>

> You could be right about all of this, of course. Who can say? I think

> what you're saying is there could be a better explanatory framework for

> everything out there, and our current explanations are some sort of "local

> maximum" which is good as far as it goes, but not the real truth, and our

> current form of explanation blinds us to the best one (and indeed maybe

> lots of better ones). I think you're almost certainly right, if that's

> what you're saying. But it was ever thus. Eventually enough hard problems

> build up, and enough clever people propose clever new ideas, and we break

> out of our parochial ideas.

>

> --

> Gary

>

>

> [Non-text portions of this message have been removed]

> - << Previous post in topic Next post in topic >>