Physics, information theory

The previous posts describe some of the components and characteristics of an information space. It is clear for the discussions that a definition of information is elusive. In once case the problem of definition is equated to that of light. We can only see light as it reveals an object while remaining invisible itself. Is it possible that information is likewise recognized only as it reveals something else, or when is seen as something else acquires shape? Just as light is, could information be considered a form of energy?

This idea might not be too far fetched. After all, physicists discuss information as something that is lost, or something that is preserved. If permanence can be expressed as preservation or loss in quantifiable nomenclature characterization of variation in amount of information may be possible without having to define information. In other words, measurement is by proxy. Information gradients are problematic but their existence is in principle an accepted fact of physics.

Forcing the topic, one could also argue that information also carries a qualitative dimension, which the measure ignores. After all, an observable consequence may be measured but unknowns in the stimuli or in the interaction between object and component stimulus would raise questions about other associated factors. The result is an unknown environment with respect to the qualitative values of information, even as information gradients might be measured.

This terminology is related to a specific disciplinary endeavor known as information theory, which borrows heavily from the physical sciences, more in particular, from the second law of thermodynamics. This law, important for classical physics, establishes that a closed system neither gains nor loses energy. Claude Shannon would present his idea of information theory by referring to the gain or loss of information by a system. His ideas, mathematical in nature, have been fundamental in the development of digital networks and signal transmission.

But as modern physics advanced in the second part of the XX Century, and into the new millennium, the second law of thermodynamics is being questioned, in particular about subatomic particles. Will this have any theoretical value as a possible new model for information? Maybe it is too early to tell, or maybe it is an unrealistic wish. The fact is that, as many forms of energy that can be stored, channeled and used, information, its nature and a plausible and encompassing definition, remain elusive.