Re: [Fis] Bell\\\'s inequality: Can we find its classical analogue? Classical and Quantum waves

2006-06-05 Thread John Collier
Professor John Collier  
Philosophy, University of KwaZulu-Natal
Durban 4041 South Africa
T: +27 (31) 260 3248 / 260 2292
F: +27 (31) 260 3031
email: [EMAIL PROTECTED]
Http://ukzn.ac.za/undphil/collier
>>> Andrei Khrennikov <[EMAIL PROTECTED]> 06/05/06 2:54 PM >>>
Dear John,

>
> On a somewhat different track, but relevant, 
> Nancy Cartwright was studying econometrics, and 
Do you know how is it possible to find a description of her ideas. I am
guite sure that there will be something wrong in her considerations.

I really doubt it, since Bas van Fraasen felt obliged to respond to it with a 
very ad hoc antirealist response. She gave the paper at the 11th Annual 
Wittgenstein Congress, and it should be in the proceedings, published in 1987 
by Vienna: Holder-Pichler-Tempsky. As, I mentioned, it fits my information 
theoretic account of causation perfectly (though the means of transmission are 
obscure, unless you adopt the Bohm-Hiley interpretation of QM, or some 
variant), which has other attractions.

In any case, the Bell inequalities apply to the econometics case. Nancy's book 
on that is among the references on her summer course page (2005) at 
http://www.nuff.ox.ac.uk/users/nielsen/res/Cartwright/Econometrics%20Summer%20School%20on%20Causality.pdf

You probably want to look also at Nature's Capacities and Their Measurement. 
The Amazon page is 
http://www.amazon.com/gp/product/0198235070/103-4607926-5971044?v=glance&n=283155

I am posting this to fis as well, since there may be more general interest.

Cheers,

John


John


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Re: [Fis] Addition of probabilities

2006-06-05 Thread Aleks Jakulin

Koichiro Matsuno wrote:

However, quantum mechanics interprets the experiments in a Hilbert space. If
a physicist picks up a strange Hilbert space, a biological organism may have
a curious intersection between being alive and dead there.


This is only a problem if one interprets the Hilbert space as truth. If 
one interprets it as a mental model made with limited information, the 
curious intersection is actually an expression of an *observer's* 
uncertainty about the organism being alive or dead or both or none.


QM is much less confusing if one adopts the internalist stance. The 
superposition is a formalization of an observer's inability to decide 
between multiple contingencies.


Aleks
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[Fis] Last remark o n Bell´s theo rem and nonlocality

2006-06-05 Thread Andrei Khrennikov
Hello,

These days we have in Vaxjo the conference \"Foundations of Probability
and Physics-4\", see http://www.vxu.se/msi/aktuellt/konferens/index.xml
There were many talks and discussions including experimenters from
leading labs in quantum information.

I would like again to remark that ideas that there was something
DEFINITELY experimentally proved on the basis of Bell´s inequality are
very naive. After 40 years of attempts to perform an experiment in that
two conditions would be satisfied:

a) Locality -- space separation;
b) Efficiency of detectors (or more general fair sampling assumption)

one should recognize that nobody knows how to perform such an experiment.

Therefore I would not pay so much attention to Bell\'s inequality. I am
afraid that some expectations were interpreted too seriously.

First we should perform an experiment, and then speak about nonlocality.
My conjecture is that an experiment combining both a and b would be
never performed. These conditions are a kind of uncertainty relations.

With Best Regards,

Andrei Khrennikov

Director of International Center for Mathematical Modeling in Physics,
Engineering, Economy and Cognitive Sc.,
University of Vaxjo, Sweden
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RE: [Fis] Bell\'s inequality: Can we find its classical analogue?Classical and Quantum waves

2006-06-05 Thread Loet Leydesdorff
>One decisive difficulty with the quantum world is with its 
> limited linguistic accessibility. If one dares to say 
> something definite about the Q world in third person 
> description in the present tense, this would come to imply 
> something definite, whenever and wherever. This form of 
> linguistic practice would inadvertently have to accept a 
> space of an infinite extension, whether flat or curved. 
> Eventually, the practice asking for a descriptive invariant 
> would reluctantly have to surrender itself to denial of the Q 
> world. Of course, the situation is not so pessimistic as it 
> may look. Unicellular organisms constituting more than 90% of 
> the biomass on the Earth may not be familiar with what 
> Euclid, Newton and Einstein accomplished, but are superb 
> dwellers in the Q world that have kept a long record of 
> surviving the hardships.

Dear Koichiro and colleagues, 

After brightly explaining that these universes emerge within a discourse,
you jump to a realistic conclusion in the last sentence: "Unicellular
organisms constituting more than 90% of the biomass on the Earth may not be
familiar with what Euclid, Newton and Einstein accomplished, but are superb
dwellers in the Q world that have kept a long record of surviving the
hardships."

Shouldn't it be: 

"... but can be considered as superb dwellers in the Q world that have kept
a long record of surviving the hardships."

By mixing the metaphor of biological evolution theory ("surviving") and the
metaphor of the Q world, you seem to reconstruct the synchronization that
you wished to avoid ?

With best wishes, 


Loet


Loet Leydesdorff 
Amsterdam School of Communications Research (ASCoR)
Kloveniersburgwal 48, 1012 CX Amsterdam
Tel.: +31-20- 525 6598; fax: +31-20- 525 3681 
[EMAIL PROTECTED] ; http://www.leydesdorff.net/ 


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