Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Constraint Structure and Admissible State Space

Diana Haskins

Published Apr 6, 2026• 0 citations
Publisher

Abstract

Demonstrates that consistency of admissible descriptions forces a linear inner product state space, without assuming quantum mechanics or spacetime.
DOI
10.5281/zenodo.19439887

Related papers

APF Paper 5 — Quantum Structure from Finite Enforceability

Ethan Brooke

Admissibility Physics — Quantum Structure from Finite Enforceability (Paper 5) This Zenodo community collects research outputs associated with Admissibility Physics, with primary focus on Paper 5 — Quantum Structure from Finite Enforceability and the derivation of quantum mechanics as an admissible representational regime. Paper 5 shows that the mathematical structure of quantum mechanics—Hilbert space, linearity, inner products, tensor products, unitary evolution, CPTP maps, and the Born rule—is not postulated, but forced by admissibility once coherent, jointly enforceable distinctions exist under finite correlation capacity. Quantum structure emerges as the unique bookkeeping required to represent interference, refinement, and recombination while preserving admissibility. The derivation does not assume probability, measurement postulates, dynamics, or spacetime geometry. Probability enters only as a secondary representation, with the Born rule arising uniquely from admissibility invariance and refinement consistency. Measurement is treated as a regime transition associated with saturation and record formation, not as a fundamental collapse mechanism. Quantum mechanics is shown to be conditionally valid: exact in regimes where coherence and non-saturation permit admissible composition, and structurally inapplicable where capacity is exhausted. Monogamy, entanglement limits, and decoherence follow from non-closure under composition and finite interface capacity, rather than from quantum axioms. All subsequent works in this community rely on the quantum-admissible representation established in Paper 5. Later papers show how variational dynamics and spacetime geometry arise as further conditional representations layered on top of quantum structure, and how quantum description itself fails at saturation boundaries, horizons, and measurement-like events. This community serves as a curated, citable archive centered on the derivation and limits of quantum structure within Admissibility Physics. Paper 5 functions as the representational keystone of the program: the point at which finite enforceability yields the quantum formalism without postulation. Core papers are frozen where noted; companion papers, mathematical appendices, figures, and computational artifacts document derivations, regime conditions, and testable consequences.

•Jan 31, 2026•0 citations

Reformulating classical and quantum mechanics in terms of a unified set of consistency conditions

Robert F. Bordley

International Journal of Theoretical Physics•Sep 1, 1983•3 citations

Hilbert Representation Ledger: Effective Hilbert Space from Finite Binary-Mechanical History Amplitudes

Adam Alexander Dick

This paper is Paper 004 in the Anaxiomatic Mechanics / pq-Spacetime stack. It develops the Hilbert-space representation layer of Binary Mechanics from the mature finite graph-history formulation established in Paper 002 and the probability scalarization developed in Paper 003. The central claim is that Hilbert space is not a primitive arena inserted at the foundation. Instead, it arises as the minimal effective representation of finite Binary Mechanics amplitude data. A realized Binary Mechanics state is a resolved finite polarized graph. From that graph, the theory generates admissible finite future-history families. These histories carry phase structure through their update sequence, and coarse-grained alternatives receive finite complex amplitudes by summing the contributions of all admissible histories in the corresponding class. Once Paper 003 supplies the no-fence scalarization of finite complex record amplitude into squared-modulus record weights, the standard finite-dimensional complex Hilbert-space structure becomes the natural ledger for the resulting amplitude distribution. Basis states represent distinguishable coarse completion channels, linear superposition records unresolved admissible history content, the inner product records the squared-modulus weight structure, and norm-preserving transformations represent closed changes of effective description. The paper emphasizes that Hilbert space is therefore a reconstruction layer, not a substrate ontology. The underlying ontology remains the finite resolved graph and its admissible history fan. Hilbert space appears because it is the compact and faithful representation of the amplitude ledger generated by Binary Mechanics itself. The paper also clarifies how tensor products, entanglement, unitary structure, and continuum quantum descriptions are to be understood as later effective layers built from finite graph-history mechanics rather than assumed at the start. This work continues the staged reconstruction program of Anaxiomatic Mechanics and pq-spacetime by showing how ordinary quantum representation theory begins to emerge from finite graph histories, phase-bearing admissible futures, and no-fence probability scalarization.

•Jun 14, 2026•0 citations

Consistency and linearity in quantum theory

Ariel Caticha

arXiv:quant-ph/9803086•Physics Letters A•Jul 1, 1998•21 citations

Consistency requirement and operators in quantum mechanics

Lubomír Skála, Kamil Brádler, V. Kapsa

Czechoslovak Journal of Physics•Mar 1, 2002•4 citations

Structural Closure and Admissibility in Physical Theory A Constraint-Based Framework for Foundational Consistency

Nathan Scott Brown

Foundational problems in physics—including quantum measurement, spacetime emergence, gravitational dynamics, nonlocality, the arrow of time, and the status of physical existence—are typically addressed in isolation, via model-dependent extensions or interpretive assumptions. This work proposes a different approach. We introduce a constraint-based framework, the Closure Admissibility Principle (CAP), which specifies minimal structural conditions any physical description must satisfy in order to be globally consistent. CAP is formulated in operational terms, using admissibility of states, recoverability under refinement, and stability of closed records, without assuming spacetime, dynamics, or ontology a priori. We show that enforcing these constraints induces a unifying closure structure on law-space, from which several persistent foundational puzzles are resolved as structural consequences rather than postulates. In particular, collapse is reclassified as record selection, spacetime and gravity emerge only in compressible regimes, General Relativity appears as an infrared universality class rather than a fundamental law, singularities correspond to failures of admissible description, and null (“nothing”) models are excluded as inadmissible fixed points. The framework is explicitly falsifiable via operational and weak-field tests, and its scope and limits are stated precisely. The results suggest that many foundational paradoxes arise not from incomplete dynamics, but from admitting globally incoherent physical descriptions.

•Feb 16, 2026•0 citations
Admissibility Physics — Quantum Structure from Finite Enforceability (Paper 5) This Zenodo community collects research outputs associated with Admissibility Physics, with primary focus on Paper 5 — Quantum Structure from Finite Enforceability and the derivation of quantum mechanics as an admissible representational regime. Paper 5 shows that the mathematical structure of quantum mechanics—Hilbert space, linearity, inner products, tensor products, unitary evolution, CPTP maps, and the Born rule—is not postulated, but forced by admissibility once coherent, jointly enforceable distinctions exist under finite correlation capacity. Quantum structure emerges as the unique bookkeeping required to represent interference, refinement, and recombination while preserving admissibility. The derivation does not assume probability, measurement postulates, dynamics, or spacetime geometry. Probability enters only as a secondary representation, with the Born rule arising uniquely from admissibility invariance and refinement consistency. Measurement is treated as a regime transition associated with saturation and record formation, not as a fundamental collapse mechanism. Quantum mechanics is shown to be conditionally valid: exact in regimes where coherence and non-saturation permit admissible composition, and structurally inapplicable where capacity is exhausted. Monogamy, entanglement limits, and decoherence follow from non-closure under composition and finite interface capacity, rather than from quantum axioms. All subsequent works in this community rely on the quantum-admissible representation established in Paper 5. Later papers show how variational dynamics and spacetime geometry arise as further conditional representations layered on top of quantum structure, and how quantum description itself fails at saturation boundaries, horizons, and measurement-like events. This community serves as a curated, citable archive centered on the derivation and limits of quantum structure within Admissibility Physics. Paper 5 functions as the representational keystone of the program: the point at which finite enforceability yields the quantum formalism without postulation. Core papers are frozen where noted; companion papers, mathematical appendices, figures, and computational artifacts document derivations, regime conditions, and testable consequences.
This paper is Paper 004 in the Anaxiomatic Mechanics / pq-Spacetime stack. It develops the Hilbert-space representation layer of Binary Mechanics from the mature finite graph-history formulation established in Paper 002 and the probability scalarization developed in Paper 003. The central claim is that Hilbert space is not a primitive arena inserted at the foundation. Instead, it arises as the minimal effective representation of finite Binary Mechanics amplitude data. A realized Binary Mechanics state is a resolved finite polarized graph. From that graph, the theory generates admissible finite future-history families. These histories carry phase structure through their update sequence, and coarse-grained alternatives receive finite complex amplitudes by summing the contributions of all admissible histories in the corresponding class. Once Paper 003 supplies the no-fence scalarization of finite complex record amplitude into squared-modulus record weights, the standard finite-dimensional complex Hilbert-space structure becomes the natural ledger for the resulting amplitude distribution. Basis states represent distinguishable coarse completion channels, linear superposition records unresolved admissible history content, the inner product records the squared-modulus weight structure, and norm-preserving transformations represent closed changes of effective description. The paper emphasizes that Hilbert space is therefore a reconstruction layer, not a substrate ontology. The underlying ontology remains the finite resolved graph and its admissible history fan. Hilbert space appears because it is the compact and faithful representation of the amplitude ledger generated by Binary Mechanics itself. The paper also clarifies how tensor products, entanglement, unitary structure, and continuum quantum descriptions are to be understood as later effective layers built from finite graph-history mechanics rather than assumed at the start. This work continues the staged reconstruction program of Anaxiomatic Mechanics and pq-spacetime by showing how ordinary quantum representation theory begins to emerge from finite graph histories, phase-bearing admissible futures, and no-fence probability scalarization.
Foundational problems in physics—including quantum measurement, spacetime emergence, gravitational dynamics, nonlocality, the arrow of time, and the status of physical existence—are typically addressed in isolation, via model-dependent extensions or interpretive assumptions. This work proposes a different approach. We introduce a constraint-based framework, the Closure Admissibility Principle (CAP), which specifies minimal structural conditions any physical description must satisfy in order to be globally consistent. CAP is formulated in operational terms, using admissibility of states, recoverability under refinement, and stability of closed records, without assuming spacetime, dynamics, or ontology a priori. We show that enforcing these constraints induces a unifying closure structure on law-space, from which several persistent foundational puzzles are resolved as structural consequences rather than postulates. In particular, collapse is reclassified as record selection, spacetime and gravity emerge only in compressible regimes, General Relativity appears as an infrared universality class rather than a fundamental law, singularities correspond to failures of admissible description, and null (“nothing”) models are excluded as inadmissible fixed points. The framework is explicitly falsifiable via operational and weak-field tests, and its scope and limits are stated precisely. The results suggest that many foundational paradoxes arise not from incomplete dynamics, but from admitting globally incoherent physical descriptions.