Wheeler's delayed-choice experiments and the time-symmetric formalisms of quantum measurement have long fueled a debate over whether time symmetry in quantum theory entails retrocausality. We argue that the debate conflates two distinct structures, and that the framework for separating them is the classical theory of conditioning: Doob $h$-transforms, Markov bridges, and enlargement of filtrations on the probabilistic side, and the forward-state/backward-effect (two-state-vector) formalism of pre- and post-selected systems on the quantum side. We sharpen Wheeler's participatory universe, delayed choice, and ``It from Bit'' into three theses and build a correspondence dictionary that maps each to a precise statement in one or both formalisms. The dictionary is anchored by two structurally isomorphic results: an operational proposition that a future measurement choice sorts the past ensemble into subensembles without disturbing any earlier marginal, and its classical counterpart, the disintegration of an unconditioned law into future-conditioned bridges -- both a single fact: marginalizing over the final measurement leaves earlier marginals fixed, by completeness of the POVM together with trace preservation on the quantum side and by the tower property of conditional expectation on the classical. The conditional calculus is time-symmetric; its causal structure is not. Delayed choice is thereby a selection effect rather than retrocausation, and the apparent ``pull from the future'' is a bridge drift. We state explicitly what the framework does not do -- it neither derives the Born rule nor solves the measurement problem -- and delineate the legitimate scope of participatory language in quantum mechanics.
Wheeler's delayed-choice experiments and the time-symmetric formalisms of quantum measurement have long fueled a debate over whether time symmetry in quantum theory entails retrocausality. We argue that the debate conflates two distinct structures, and that the framework for separating them is the classical theory of conditioning: Doob h-transforms, Markov bridges, and enlargement of filtrations on the probabilistic side, and the forward-state/backward-effect (two-state-vector) formalism of pre- and post-selected systems on the quantum side. We sharpen Wheeler's participatory universe, delayed choice, and It from Bit'' into three theses and build a correspondence dictionary that maps each to a precise statement in one or both formalisms. The dictionary is anchored by two structurally isomorphic results: an operational proposition that a future measurement choice sorts the past ensemble into subensembles without disturbing any earlier marginal, and its classical counterpart, the disintegration of an unconditioned law into future-conditioned bridges -- both a single fact: marginalizing over the final measurement leaves earlier marginals fixed, by completeness of the POVM together with trace preservation on the quantum side and by the tower property of conditional expectation on the classical. The conditional calculus is time-symmetric; its causal structure is not. Delayed choice is thereby a selection effect rather than retrocausation, and the apparent pull from the future'' is a bridge drift. We state explicitly what the framework does not do -- it neither derives the Born rule nor solves the measurement problem -- and delineate the legitimate scope of participatory language in quantum mechanics.
The main mystery of quantum mechanics is contained in Wheeler's delayed choice experiment, which shows that the past is determined by our choice of what quantum property to observe. This gives the observer a participatory role in deciding the past history of the universe. Wheeler extended this participatory role to the emergence of the physical laws ("law without law"). Since what we know about the universe comes in yes/no answers to our interrogations, this led him to the idea of "it from bit" (which includes the participatory role of the observer as a key component). The yes/no answers to our observations ("bit") should always be compatible with the existence of at least a possible reality - a global solution ("it") of the Schrodinger equation. I argue that there is in fact an interplay between "it" and "bit". The requirement of global consistency leads to apparently acausal and nonlocal behavior, explaining the weirdness of quantum phenomena. As an interpretation of Wheeler's "it from bit" and "law without law", I discuss the possibility that the universe is mathematical, and that there is a "mother of all possible worlds" - named the "Axiom Zero".
This deposit contains the complete English translation of v1 (28 January 2026) of the preprint “Dualité onde-corpuscule, choix retardé et présentisme probabiliste”. Published French source and related work Published French v1: Zenodo 18404150 — DOI: 10.5281/zenodo.18404150 Concept DOI for the French work: 10.5281/zenodo.18404149 Reference preprint on probabilistic presentism: 10.5281/zenodo.18207811 Scope. Wave–particle duality and delayed-choice experiments are often presented as if present choices could rewrite the past. This article develops an alternative reading within probabilistic presentism: only the present exists ontologically, while the future corresponds to a structured space of possibilities. Central distinction. The wave aspect describes a coherent structure of possibilities before actualization; the particle aspect describes a present fact in the form of a localized event. The “late choice” fixes the experimental context in which a fact becomes defined; it does not retroactively alter an already factual past. Experiments and constraints. The discussion covers Born's rule, interference, which-path information, decoherence, outcome uniqueness, no-signalling, the double slit, Wheeler's delayed choice, delayed-choice quantum erasers, and EPR/Bell correlations. Conditional interference patterns are treated as post-selected correlations and not as signals sent into the past. Status. This is a conceptual and exploratory preprint. Interpretive claims are identified as such, and the framework is not presented as an experimentally validated replacement for quantum mechanics. Translation fidelity. This English edition is a translation, not a revised scientific version. It preserves the argumentative structure, equations, references, links, limitations, and epistemic qualifications of the published French v1.
Abstract This paper will deal specifically with the concept of extending some of the contentions and theories of John Archibald Wheeler into a more complete description of reality, supported in part by physical experiments. The subjects that will be dealt with are well known from quantum theory, and now lately - Nick Bostrom's simulation theory, but will be seen through a new reinterpretation that connects seamlessly, prior positions of Wheeler into a self-consistent model that defines the nature of the physical universe through the convergence of information universe models and the Everett/Wheeler hypothesis. Hints will be given, as to how the reported desires of so-called Silicon Valley billionaires to leave the simulated universe, can be fulfilled using on-the-horizon technology to accomplish time travel through the manipulation of the information based fabric underpinning reality. In whole, the following will be major points discussed: 1. J.A. Wheeler posited that even the greatest mathematical equation in the universe is missing something, the principle by which can become real. He also said, no phenomenon is a phenomenon until is an observed phenomenon. 2. Wheeler developed his theory of it from bit, explaining that the physical world was based upon information at a fundamental level 3. Seth Lloyd, taking that thought further, said that the universe acts like a giant computer processing the information contained therein. 4. Nick Bostrom posited that, in fact, our universe is a computer simulation created by our post-human descendants in the distant future. 5. Philip K. Dick science fiction writer and visionary, in his 1977 public statements mentioned, that due to to events in the past being reprogrammed, things in the present could be changed so that an alternate universe splits off. 6. The universe is participatory, not just with humans, but everything else. *Just as various events cause a variety of phenomena, in the extreme cases, the universe responds in the extreme by producing alternate universes. This process resolves many of the issues related to quantum phenomena, parallel universes and time travel* 7. The detection of a simulated universe and escape therefrom is similar but not the same as doing so with an information universe. Escape from a simulated universe is impossible just as its detection may be. However, in this paper, a series of experiments will be presented that for the first time ever, establish such a possible detection as well as the method of ultimate escape from our information based universe.
Delayed-choice and quantum eraser experiments are frequently interpreted as implying retrocausal effects, in which present measurement decisions influence past physical events. This paper develops an Observer-First Interpretation (OFI) in which quantum states are treated as observer-relative informational constructs constrained by evidence accessibility and record availability. Within this framework, delayed-choice phenomena do not involve backward-in-time physical influence, but instead arise from conditional informational updates applied to measurement records that were never globally fixed. Temporal paradoxes emerge only when observer-relative state assignments are illegitimately promoted to observer-independent histories. The proposed interpretation preserves causal ordering, respects relativistic constraints, and reproduces all standard quantum predictions without modifying the formalism of quantum mechanics.
The Delayed-Choice Quantum Eraser experiment is commonly interpreted as implying that in quantum mechanics a choice made at one time can influence an earlier event. We here suggest an extension of the experiment that results in a paradox when analysed in a local realist interpretation combined with backward causation (``dynamical retrocausality''). We argue that resolving the paradox requires giving up the idea that, in quantum mechanics, a choice can influence the past in this way, and that it instead requires a violation of Statistical Independence without (what most people think of as) retrocausality. Finally, we propose an implementation of the experiment that we believe to be possible with existing technology. This new experiment can distinguish between different types of hidden-variables theories in a way that Bell-type tests cannot: unlike in a Bell test, the measurement setting here is set by an earlier outcome, which makes the consistency of the backwards influence itself testable. We classify the fixed-point (consistency-enforcing) hidden-variables models of the experiment, which can reproduce quantum mechanics only if the backwards influence has no observable effect.
Certain quantum phenomena, including delayed-choice experiments, entanglement swapping,and post-selection effects, exhibit correlations that appear to imply retrocausality or backwardinfluence from future measurement to past events. This paper proposes a resolution that doesnot invoke backward time travel, modification of unitary dynamics, or exotic spacetime struc-tures. Instead, apparent retrocausal effects are shown to arise from a forward-only processtermed Probability Observation Shift, in which irreversible constraint formation selects amongpre-existing coherent histories. The observer’s effective history may change, but no physicalprocess propagates backward in time. This mechanism preserves causality, avoids paradox, andprovides a unified interpretation of several quantum “time-reversal” paradoxes.