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Monday, 16 March 2026

Entropic Fixity of the Past: Resolving Avshalom Elitzur’s Temporal Paradox through the Theory of Entropicity (ToE)

Entropic Fixity of the Past: Resolving Avshalom Elitzur’s Temporal Paradox through the Theory of Entropicity (ToE)

Preamble 

Recent discussions on the foundations of quantum mechanics have raised profound questions about the nature of time and causality. In particular, physicist Avshalom Elitzur has argued that certain quantum phenomena challenge the classical assumption that the past is fully fixed and independent of present actions. Experiments such as delayed-choice and quantum eraser experiments appear to suggest that present decisions may influence past events, thereby raising the possibility of retrocausality.

The Theory of Entropicity (ToE) provides a coherent resolution to this tension without abandoning the arrow of time. In ToE, entropy is not merely a statistical measure but a fundamental physical field governing the emergence of distinguishability, physical events, and temporal order. Within this framework, the past becomes historically fixed only when entropy flow produces irreversible distinguishability between alternative states.

Furthermore, the Obidi Curvature Invariant (OCI = ln 2) establishes the minimal entropic curvature required for distinguishability and therefore functions as a structural separator between temporal regimes. As a result, the past, present, and future remain irreversibly separated, preserving the arrow of time while explaining why certain quantum experiments appear to allow present actions to influence the past.

Thus, the Theory of Entropicity does justice to Elitzur’s concerns about the nature of temporal reality while resolving them within a framework that preserves causal integrity and the structural irreversibility of time.


1. Introduction

The nature of time has long been one of the most profound questions in physics. Classical physics treated time as an absolute background parameter, while Einstein’s theory of relativity incorporated time into the geometry of spacetime. Quantum mechanics, however, introduced phenomena that challenge classical intuitions about temporal order and causality.

One of the most provocative ideas emerging from the foundations of quantum mechanics is the suggestion that the past may not be completely fixed. Certain interpretations of quantum experiments, particularly delayed-choice and quantum eraser experiments, have been interpreted as implying that present actions can influence past events.

Physicist Avshalom Elitzur has been among those who emphasize the philosophical implications of these phenomena. The claim that the past may not be fully determined raises deep questions about the nature of temporal reality and the structure of physical law.

The Theory of Entropicity (ToE) offers a new perspective on this issue. Rather than abandoning the arrow of time or embracing literal retrocausality, ToE proposes that the apparent flexibility of the past arises from the dynamics of entropy and the conditions required for distinguishability.


2. The Entropic Basis of Physical Reality

In the Theory of Entropicity, entropy is elevated from a statistical quantity to a fundamental physical field defined across space and time.

Within this framework, entropy governs the emergence of physical events. A configuration of reality becomes physically meaningful only when it becomes distinguishable from alternative configurations.

Distinguishability therefore acts as the bridge between potential states and realized events.

This perspective transforms the role of entropy. Instead of merely describing disorder or probability, entropy determines when physical states become irreversibly distinct. Through this process, entropy generates the arrow of time.

The progression of time therefore corresponds to the progressive entropic separation of distinguishable states.


3. Distinguishability and Irreversibility

A central principle within the Theory of Entropicity is that distinguishability requires irreversibility.

If two physical states are fully distinguishable, then the process separating them must involve irreversible entropy production. Without such irreversibility, the states would remain indistinguishable and therefore would not constitute separate physical realities.

This principle has profound consequences for the nature of temporal order.

Events become historically fixed only when irreversible entropy flow produces distinguishability between alternative possibilities.

Before such entropic closure occurs, multiple potential histories may remain compatible with the system.


4. The Apparent Retrocausality of Quantum Experiments

Delayed-choice experiments and quantum eraser experiments appear to suggest that present actions can determine how particles behaved earlier in time.

For example, in certain delayed-choice experiments, a photon appears to behave either as a particle or as a wave depending on a measurement decision made after the photon has already passed through part of the apparatus.

At first glance, such results seem to imply that the present influences the past.

However, the Theory of Entropicity interprets these experiments differently.

In ToE, the trajectory of a system does not become historically fixed until the entropic closure of distinguishability occurs. Until that closure happens, multiple possible histories may remain consistent with the physical state of the system.

The measurement process generates irreversible entropy and therefore produces the distinguishability that fixes the historical outcome.

Thus, the apparent retrocausal influence arises not because the past is rewritten but because the distinguishable history of the system was not yet finalized.


5. Ontic History and Epistemic History

The Theory of Entropicity resolves the temporal paradox by distinguishing between two senses of the past.

The ontic past refers to the actual physical events that occurred in the universe.

The epistemic past refers to the reconstruction of those events through distinguishable physical records.

In certain quantum experiments, the epistemic past may remain underdetermined until entropic closure occurs through measurement.

When that closure occurs, the system becomes irreversibly distinguishable and the past becomes historically fixed.

Thus, the present may influence which past becomes distinguishable without rewriting the ontic history of the universe.


6. The Obidi Curvature Invariant

A deeper level of the Theory of Entropicity emerges through the introduction of the Obidi Curvature Invariant

OCI = ln 2.

This invariant represents the minimal entropic curvature required for two states to become distinguishable.

Without this minimal separation, states remain indistinguishable and therefore cannot constitute distinct physical realities.

The invariant therefore expresses the fundamental threshold that separates distinguishable states of reality.


7. OCI as a Separator of Temporal Regimes

The implications of OCI extend beyond the separation of physical states.

Because distinguishability defines when events become historically fixed, the invariant also functions as a separator between temporal regimes.

By the ToE principle of Distinguishability, it means that we cannot actually affect the past or the future without still respecting the arrow of time because of the Obidi Curvature Invariant OCI of ln 2 that separates past from present and from the future.

Distinguishability therefore imposes a boundary condition on time.

Once an event crosses the entropic threshold of distinguishability, it belongs to a different curvature class of reality than the undecided present state.

Consequently, the past cannot be re-entered as though it were still open, and the future cannot be accessed as though it were already fixed.


8. Preservation of the Arrow of Time

The existence of OCI leads to an important conclusion.

Neither the past nor the future can be physically affected in a way that abolishes the arrow of time, because OCI = ln 2 enforces the minimal irreversible curvature required for distinguishability, thereby separating temporal modes of reality.

This means that apparent retrocausal phenomena must remain consistent with the invariant structure imposed by distinguishability.

What appears as influence on the past is not a rewriting of history but rather a change in the distinguishable reconstruction of events that had not yet crossed the entropic threshold.


9. Epistemic Access versus Ontological Reality

The Theory of Entropicity therefore clarifies the nature of temporal paradoxes.

The present may refine the distinguishable reconstruction of a past event, but it cannot reopen the ontological reality of that event.

This leads to a concise formulation:

The past may be revisited epistemically, but not re-opened ontologically.
The future may influence present expectation, but not become presently fixed without passing through the entropic separator enforced by OCI = ln 2.

Thus, the arrow of time remains preserved as a structural consequence of distinguishability itself.


10. The Obidi Temporal Separation Principle

The above reasoning can be summarized through the following principle.

Obidi Temporal Separation Principle

In the Theory of Entropicity, the Obidi Curvature Invariant OCI = ln 2 defines the minimal entropic curvature necessary for physical distinguishability. As a consequence, temporal regions are not continuously interchangeable: the past, present, and future are separated by irreversible distinguishability thresholds. Therefore, no apparent influence of the present upon the past, nor of the future upon the present, can violate the arrow of time, because all such relations must remain consistent with the invariant entropic separation imposed by OCI.


11. The Distinguishability Principle of Temporal Integrity

A deeper implication of this structure may be expressed as follows.

Distinguishability Principle of Temporal Integrity

If a physical state is distinguishable, then it must already satisfy an irreversible entropic separation from alternative states. Hence, temporally distinct states cannot be collapsed into one another without violating the Obidi Curvature Invariant OCI = ln 2. Therefore, the arrow of time is preserved as a necessary consequence of distinguishability itself.


12. Justice to Elitzur’s Concern

The Theory of Entropicity therefore does justice to the concern raised by Avshalom Elitzur regarding the apparent instability of the past in quantum phenomena.

Elitzur is correct that quantum experiments challenge the naïve classical assumption that the past is always fully determined before measurement.

However, ToE resolves this tension without abandoning the arrow of time.

Within the Theory of Entropicity, the issue is not that the past is rewritten, but that historical reality becomes fully fixed only through irreversible entropic distinguishability, structurally bounded by the Obidi Curvature Invariant OCI = ln 2.

Thus, what appears as retrocausality is better understood as delayed entropic fixation of distinguishable history.


13. Conclusion

The Theory of Entropicity provides a coherent framework for understanding the strange temporal features of quantum phenomena.

Rather than treating entropy as a secondary statistical concept, ToE proposes that entropy is a fundamental physical field governing the emergence of distinguishability and temporal order.

Through this perspective, the apparent retrocausal behavior of certain quantum experiments is revealed to be an illusion arising from delayed entropic closure.

The Obidi Curvature Invariant OCI = ln 2 enforces the minimal irreversible separation required for distinguishability and therefore preserves the structural integrity of temporal regimes.

The universe does not rewrite its history.

Instead, history becomes progressively revealed through the irreversible entropic separation of distinguishable states.

In this way, the Theory of Entropicity resolves the paradox raised by Elitzur while preserving the fundamental arrow of time.

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