Re: Quantum Time Travel

From: Jacques Mallah <jackmallah.domain.name.hidden>
Date: Tue, 16 May 2000 11:00:53 -0700 (PDT)

--- Russell Standish <R.Standish.domain.name.hidden> wrote:
> Jacques Mallah wrote:
> > resulting in M(y) = y <y|x> / (y <y|y>) = <y|x>
> > which is still the wrong formula since M(y) should

> >be p(y) = |<y|x>|^2. Your paper seemed, from what
I
> > could tell, to have the same problem and thus give
> > a wrong prediction.
>
> OK, I've been hoisted by my own petard. The basic
> axioms of probability require the state space to be
> a Hilbert space, which implies the L_2 norm should
> be used, ie the modulus squared of the above
> property. I skipped over this portion of it in
> my paper, so it is not suprising I made a mistake. I
> also haven't opened a QM textbook in 15 years.

    Well I doubt your approach to deriving the
probabilities is legitimate, and this certainly
doesn't help convince me otherwise. So I suggest you
try to fix up your paper.

> > > A quantum history is a set of observed outcomes
> > > (linked by time), governed by a quantum process
> > > (ie Schroedinger equation).
> >
> > First, explain what you mean by "linked".
> > Second, the SE governs a physical system, not
> > a "set of observed outcomes".
>
> Linked in the sense that points of a trajectory are
> linked. Not a difficult concept.

    So you seem to be saying that there is some
variable U(t) which varies continuously, and that U
takes on "observed outcome" values. If so, be *much*
more specific about what is involved, and I might
start understanding what you have in mind. (Which, in
turn, might help me learn you some stuff.)

> In the Multiverse view, there are _no_ physical
> systems. The SE governs evolution of the individual
> histories (or worlds if you like) of the Multiverse.

    Why isn't the multiverse a physical system then?

=====
- - - - - - -
               Jacques Mallah (jackmallah.domain.name.hidden)
         Physicist / Many Worlder / Devil's Advocate
"I know what no one else knows" - 'Runaway Train', Soul Asylum
         My URL: http://hammer.prohosting.com/~mathmind/

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Received on Tue May 16 2000 - 11:05:07 PDT

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