The new Entropic Information approach
We start this first step introduction with a very deep analysis of the bottom level of what we call the Reality.
For that approach, we'll take the "it from bit" perspective route.
"it from bit" perspective symbolizes the idea that every item of the physical world has at bottom — at a very deep bottom, in most instances — an immaterial source and explanation; that what we call reality arises in the last analysis from the posing of yes-no questions and the registering of equipment-evoked responses; in short, that all things physical are information-theoretic in origin and this is a participatory universe”.
"It’s one thing to say that measurement requires information. It’s another thing to say that the thing being measured is created by the observer doing the measuring".
The new Entropic Information approach is in line with a semiclassical approach where the space is described by general relativity theory and the matter is described by quantum field.
This can be realize by Quantum field theory in curved spacetime (QFTCS) being an extension of quantum field theory from Minkowski spacetime to a general curved spacetime.
Where, the spacetime is treated by this theory as a fixed, classical background, while for the matter and energy propagating through that spacetime are explained by adescription provided by quantum-mechanics.
Quantum field theory in curved spacetime (QFTCS) is a viable approximation of the theory of quantum gravity when spacetime curvature is not significant on the Planck scale.
The spacetime in which the fields propagate is classical but dynamical. The curvature of the spacetime is given by the semiclassical Einstein equations.
After this short presentation about the general framework used in entropic information theory, let us now focus on what is, following the Entropic Information Theory, the fundamental building block of our universe: the entangled quantum information.
Indeed, we can say that the new Entropic Information approach is founded on the bit of information such as the number of bits of the system is the number of bits necessary to specify the actual microscopic configuration among the total number of microstates allowed and thus characterize the macroscopic states of the system under consideration.
Where, following the Entropic Information Theory, the entropy of a thermodynamic system in equilibrium measure of the uncertainty as to which all its internal configurations compatible with its macroscopic thermodynamic parameters (temperature, pressure, etc.) are actually realized.