A Quantum Theory of the Present: Entangled Reconstruction, Probabilistic Actualization, and Emergent Time
Abstract
Physics describes evolution, causal structure, and measurement outcomes, but lacks an accepted physical account of why one outcome-conditioned quantum situation is actual as the present. This article develops a conditional account within the reconstruction program, which places a premetric selection layer prior to spacetime dynamics. The Indefinite Reconstruction Stability Principle requires identities and readable relations to survive admissible continuation and to ignore unobservable distinctions. A present is proposed to be the outcome-conditioned quantum read-out of an IRSP-stable, history-bearing reconstruction boundary. Because the underlying relational record need not factorize, its read-out is generally entangled rather than a classical instantaneous configuration. Admissible successors are represented by a quantum instrument; present actualization postulates that one stable record sector becomes definite with its conditional probability, without an external observer. An explicit event-identity bridge identifies operationally equivalent realizations of the same descended event, and observable descent then makes its weight independent of reconstruction representative and unread embedding context. Given positivity, normalization, exclusive additivity, and a Hilbert-space read-out, Gleason representation fixes the Born form. Linear history composition implies no genuine third-order successor interference. Proper inheritance of the complete ancestry class supplies a…
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