1. Deriving from the Obidi Action
We write the Obidi Action in a local, coarse‑grained, entropic‑field form as
with an effective entropic Lagrangian density
where is an entropic stiffness parameter and is the local entropic energy density associated with temperature .
For a mode of the entropic field with characteristic spatial scale and temporal scale , we approximate
The kinetic and gradient contributions per coherence volume then scale as
For a coherent entropic mode propagating at the maximal reconfiguration speed , we have , so the kinetic and gradient contributions are of the same order and we can treat the mode as a relativistic entropic excitation.
Now impose the entropic–quantum matching condition that a single coherence mode carries one quantum of action over a coherence time . The characteristic energy of such a mode is then
On the other hand, from the entropic side, the same coherence volume at temperature carries an entropic energy of order
interpreting as the characteristic entropic energy scale per coherence mode (one effective entropic degree of freedom).
The Obidi Action enforces entropic equivalence between these two descriptions of the same coherent excitation: the quantum‑relativistic energy of the mode and its entropic energy must match at the level of a single coherence unit. Thus
Solving for yields
which is the desired relation, now explicitly derived as the condition that a single Obidi‑coherent entropic mode simultaneously saturates the quantum of action , the maximal entropic speed , and the entropic energy scale in the Obidi Action.
2. Emergence from the Master Entropic Equation (MEE)
At the level of the Master Entropic Equation, the entropic field obeys a dynamical equation of the schematic form
where is a nonlinear, nonlocal operator encoding the variational derivative of the Obidi Action with respect to . In a locally linearized, homogeneous background at temperature , small fluctuations around a stationary configuration satisfy an effective wave‑type equation
where is an effective entropic “mass” term generated by the temperature‑dependent part of the Obidi Action (through and its functional derivatives).
For a mode with wavevector , the dispersion relation is
Define the entropic coherence length as the inverse of the effective mass scale,
In a thermal entropic background, the effective mass is set by the entropic energy scale via
so that
To incorporate the quantum of action, we require that the minimal coherent mode of this dispersion relation carries action , which introduces into the effective mass–temperature relation. Matching the quantum energy to the entropic energy as in the previous section refines the proportionality to the exact identity
Thus, at the level of the MEE, emerges as the inverse entropic mass scale of small fluctuations, with its temperature dependence fixed by the requirement that the fundamental entropic mode simultaneously satisfies the quantum, relativistic, and entropic energy scales.
3. Interpreting as the Obidi Entropic Length
Within ToE, is naturally interpreted as the Obidi Entropic Length: the minimal coherence length of the entropic field at a given entropic temperature . It is the smallest scale over which the field can reorganize coherently without fragmenting into independent, decohered patches.
The identity
then acquires a clear physical meaning: at temperature , the entropic field can maintain a single quantum of coherent reconfiguration over a length , carrying energy and action while propagating at the maximal entropic speed . As increases, the same quantum of action must be packed into a more agitated background, so the coherence length shrinks; the field loses the ability to maintain long‑range coherence, and entropic reconfiguration becomes more locally fragmented.
This is precisely the behaviour expected of a fundamental coherence length: it measures not physical size but the range of sustained entropic correlation. In this sense, is the entropic analogue of a correlation length in statistical physics, elevated to a fundamental role in the ontology of ToE.
4. Integration into the ToE axioms as a fundamental entropic identity
The relation
can be elevated to the status of a fundamental entropic identity in the axiomatic structure of the Theory of Entropicity. In words:
For any entropic temperature , there exists a unique Obidi Entropic Length such that a single coherent entropic mode of scale , propagating at the maximal entropic speed , carries exactly one quantum of action and one unit of entropic energy .
Axiomatically, this identity ties together four pillars of ToE in a single statement:
(1) encodes the minimal quantum of entropic action;
(2) encodes the maximal entropic reconfiguration rate;
(3) encodes the local entropic energy scale;
(4) encodes the Obidi Entropic Length, the coherence scale of the entropic field.
By declaring as a fundamental identity, ToE asserts that quantum discreteness, relativistic limitation, thermodynamic intensity, and entropic coherence are not independent features of reality but different faces of a single entropic substrate. This identity can be placed alongside the Entropic Accounting Principle (EAP), the Entropic Equivalence Principle (EEP), the Entropic Resistance Principle (ERP), and the Cumulative Delay Principle (CDP) as one of the core axioms that define the structure and behaviour of the entropic universe.