Re: Nonseparability,
coherence,
spatial order...

Date: Tue, 12 Dec 1995 12:05:47 -0800
From: Jack Sarfatti <sarfatti@ix.netcom.com>
Reply to: quantum-d@teleport.com
To: quantum-d@teleport.com
Subject: QUANTUM-D: Re: nonseparability, coherence, spatial order

On 12 December David Finkelstein wrote: 

> 1. Quantum nonseparability (= entanglement) is a consequence
> of coherence for the case of composite (product) systems.
>
> 2. I suppose that spacetime itself is a macroscopic coherent
> mode of a more general structure, as a superconductor is a 
> mode of a polyatomic crystal. I tentatively dub this oldest 
> of the supercondensates "supercrystal", to go with superconductor 
> and superfluid. It is characterized by perfect defect-mobility
> (infinite defect-mobility with Meissner effect) and a transition 
> temperature of hundreds of GeV's (at least)...

Yes, I have also had this sort of idea. In fact I once in (1967) 
published a short paper in Physics Letters predicting an ODLRO state in 
crystals which would be an analog to David's model of the vacuum.

> This refers to a speculative theory still under development.
>
> 3. I do not know how to apply quantum theory to the universe as a 
> whole (and in particular to the big bang). One of the prime tenets
> of quantum theory is that its operators represent actions that 
> are possible in principle. A sharp determination of the universe 
> (by someone inside it, it goes without saying) is impossible in 
> principle. A quantum theory that allows the kind of determinations 
> that we can make in principle and only those is still beyond my ken. 
> It would seem to require an extension of Dirac transformation theory
> from whole closed systems to partially open systems. As far as I know
> a theory of this kind is not yet under development.

That's precisely where the back-action comes in. It also allows
a Godelian self-referential loop so one can measure from inside
the system - sort of like bug on curved surface can measure
intrinsic Gauss curvature. But the theory for open systems
has strong violation of both unitarity and microcausality.
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