Enticuant: Book IX of the RCD 2.0 Program — Five Chapters on Coherence: Geometry, Thermodynamics, and Empirical Law

This is the academically citable, open-access companion to the printed monograph "Enticuant: Book IX of the RCD 2.0 Program — Five Chapters on Coherence: Geometry, Thermodynamics, and Empirical Law" (Arturo Cerezo García, Quantum Benchmark Insights, May 2026, ISBN-13 979-8195474782). Book IX of the RCD 2.0 program (Radial Coherential Dynamics) introduces and consolidates a new conceptual term — the enticuant — and gathers five chapters that the program took two years to earn. Not by speculation. By measurement, by calculation, by verification across multiple independent quantum hardware platforms. The enticuant names what the coherential field C(x,t) becomes when it crosses from formal scalar to operational object: when its decoherence is organized by the Hamming distance, when its irreversibility is measured on real quantum machines, when its geometric counterpart in disformal gravity is bounded by mathematical theorem. Five chapters, five verbs: — RELOCATE: GHZ entanglement is moved from theoretical center to coherential limit (Chapter VI), based on a five-platform validation campaign on IBM Heron, IonQ Forte, Rigetti Ankaa-3, IQM Garnet, and IQM Emerald. — SITUATE: RCD is positioned with respect to the Standard Model (Chapter VII), declaring four explicit walls the program does not cross. — NAME: The Coherential Hamming Law (Chapter VIII), a transversal empirical regularity verified on five quantum architectures with statistical significance p ≈ 7×10⁻²⁷. — MEASURE: The first structured experimental measurement of the coherential component of irreversible entropy Ξ on commercial NISQ hardware (Chapter IX), with a six-point curve on IBM ibm_fez. — PROVE: A mathematical theorem of disformal subluminality with dust (Chapter X), demonstrating that the scalar sound speed in DHOST gravity is subluminal in any astrophysically relevant environment, with explicit GW170817 compatibility. Each chapter integrates a guest voice — Hamming, Heraclitus, Boltzmann, Newton, Lao Tzu, Vera Rubin, and others — acknowledging the program's debt to twenty-five centuries of rigorous thought. The complete book consists of: Threshold, Foreword, Prologue ("La Idea Antes de la Idea"), and ten integrated chapters (I — The Coherential Field; II — Coherential Perturbations; III — Gravitational Coupling; IV — The Enticuant; V — Geodesometry of Coherence; VI — GHZ as Coherential Limit; VII — Two Scalar Fields; VIII — Coherential Hamming Law; IX — Thermodynamics of Coherence; X — Geometry of Coherence). All raw experimental data referenced in the book is publicly deposited on Zenodo. The measurement remains the arbiter. Five chapters, five verbs: Relocate · Situate · Name · Measure · Prove. This Zenodo deposit makes the full text openly available under CC-BY 4.0 alongside the printed paperback edition, enabling academic citation, indexing in OpenAIRE, and integration into the broader RCD 2.0 program registry on Zenodo.