Greetings All,

While I like to think that I am not limited to reductionistic thinking, I find 
it difficult to understand any perspective on information that is not limited 
to physical manifestation. I would appreciate further justification for a 
non-physicalist perspective on information.  How can something exist in the 
absence of physical manifestation?  I am not interested in a metaphysical 
perspective here, which might have heuristic value even if it is not 'real'.  
The issue of 'content' and 'meaning' strikes me as entirely physical, so 
mentioning those issues doesn't help me understand what non-physical 
information might be.  I would say that if information is physically manifested 
by contrasts (gradients, negentropy, …), then content or meaning refers to the 
internal dynamics of complex systems induced by interaction between the system 
and the physically manifested information.  If there is no affect on internal 
dynamics, then the system did not 'perceive' the information.  If the 
information merely causes a transient fluctuation of the internal dynamics, 
then the perceived information was not meaningful to the system.  At least this 
is a sketch of my view that I hope illustrates why the notions of 'content' and 
'meaning' does not depart the physical realm for me.



From: Pedro Clemente Marijuan Fernandez 
Date: Fri, 16 Mar 2012 04:19:31 -0700
To: Foundations of Information Science Information Science 
Subject: Re: [Fis] Physics of computing

Dear discussants,

I tend to disagree with the motto "information is physical" if taken too 
strictly. Obviously if we look "downwards" it is OK, but in the "upward" 
direction it is different. Info is not only physical then, and the dimension of 
self-construction along the realization of life cycle has to be entered. Then 
the signal, the info, has "content" and "meaning". Otherwise if we insist only 
in the physical downward dimension we have just conventional computing/ info 
processing. My opinion is that the notion of absence is crucial for advancing 
in the upward, but useless in the downward.
By the way, I already wrote about info and the absence theme in a 1994 or 1995 
paper in BioSystems...


---Pedro<> escribió:

Thanks John and Kevin to update issues in information, computation, energy and 

 I would like point out to other articles morefocused in how coherence and 
entanglement are used by living systems (far from thermal equilibrium):

Engel G.S., Calhoun T.R., Read E.L., Ahn T.K., Mancal T., Cheng Y.C., 
Blankenship R.E., Fleming G.R. (2007) Evidence for wavelike energy transfer 
through quantum coherence in photosynthetic systems. Nature, 446(7137): 782-786.

Collini E., Scholes G. (2009) Coherent intrachain energy in migration in a 
conjugated polymer at room temperature.  Science, vol. 323 No. 5912 pp. 369-373.

Gauger E.M., Rieper E., Morton J.J.L., Benjamin S.C., Vedral V. (2011) 
Sustained Quantum Coherence and Entanglement in the Avian Compass. Phys. Rev. 
Lett., 106: 040503.

Cia, J. et al, (2009)  Dynamic entanglement in oscillating molecules.  
arXiv:0809.4906v1 [quant-ph]




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Pedro C. Marijuán
Grupo de Bioinformación / Bioinformation Group
Instituto Aragonés de Ciencias de la Salud
Avda. Gómez Laguna, 25, Pl. 11ª
50009 Zaragoza, Spain
Telf: 34 976 71 3526 (& 6818) Fax: 34 976 71 5554<>

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