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Appendix: From the Sum-Zero of Fluctuations to Uncertainty — The Uncertainty Relation as the Allocation of a Half-Bit

Noriaki Kihara

Published Jun 18, 2026• 0 citations
Publisher

Abstract

This appendix develops independently a single point compressed in section 6.3 of the related report (On the Logarithmic Map of Scale and the Separation of Scale and Quantization): that the uncertainty relation in the observable space (constant product) is derived from the sum-zero of fluctuations in the fundamental-quantity N-space. The emphasis is on the direction of the derivation: sum-zero (Delta_a + Delta_b = 0) is placed as the definition, and the constant product is the consequence, the two being connected by the logarithmic map N=log2(nu). Under sum-zero, the half-bit +/-1/2 remains irreducibly on each fundamental quantity with anti-correlated signs, and the product of the observables a*b = 2^K is fixed (whereas the product of the fluctuations delta_a*delta_b is not constant). The continuous squeeze (a hyperbola a*b = 2^K) is the trade-off where tightening one widens the other, with the fixed half-bit as its minimal unit. The +/-1/2 is treated as a posit, not a derivation; no physical identification is made; uncertainty here is not in the sense of Bell's theorem.

DOI
10.5281/zenodo.20742277

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This appendix develops independently a single point compressed in section 6.3 of the related report (On the Logarithmic Map of Scale and the Separation of Scale and Quantization): that the uncertainty relation in the observable space (constant product) is derived from the sum-zero of fluctuations in the fundamental-quantity N-space. The emphasis is on the direction of the derivation: sum-zero (Delta_a + Delta_b = 0) is placed as the definition, and the constant product is the consequence, the two being connected by the logarithmic map N=log2(nu). Under sum-zero, the half-bit +/-1/2 remains irreducibly on each fundamental quantity with anti-correlated signs, and the product of the observables ab = 2^K is fixed (whereas the product of the fluctuations delta_adelta_b is not constant). The continuous squeeze (a hyperbola a*b = 2^K) is the trade-off where tightening one widens the other, with the fixed half-bit as its minimal unit. The +/-1/2 is treated as a posit, not a derivation; no physical identification is made; uncertainty here is not in the sense of Bell's theorem.
Uncertainty principle is one of the cornerstones of quantum theory. In the literature, there are two types of uncertainty relations, the operator form concerning the variances of physical observables and the entropy form related to entropic quantities. Both these forms are inequalities involving pairwise observables, and are found to be nontrivial to incorporate multiple observables. In this work we introduce a new form of uncertainty relation which may give out complete trade-off relations for variances of observables in pure and mixed quantum systems. Unlike the prevailing uncertainty relations, which are either quantum state dependent or not directly measurable, our bounds for variances of observables are quantum state independent and immune from the "triviality" problem of having zero expectation values. Furthermore, the new uncertainty relation may provide a geometric explanation for the reason why there are limitations on the simultaneous determination of different observables in N-dimensional Hilbert space.
In 1927, Werner Heisenberg published the inequality that bears his name: Δx · Δp ≥ ℏ/2. The product of position and momentum uncertainties has a floor. No matter how the state is prepared or how the measurement is performed, the uncertainty in position multiplied by the uncertainty in momentum cannot drop below half of Planck’s reduced constant. The floor is sharp — Gaussian wavepackets saturate it, and no state goes below. The inequality is one of the most directly empirical structures in physics. It governs the diffraction of single particles through slits, the resolution limits of microscopes, the zero‑point energy of harmonic oscillators, the stability of atomic ground states, and the sensitivity of interferometric measurements. Any technology pushing against the limits of precision measurement runs into ℏ/2 sooner or later. The question is where the bound comes from, and why the constant is exactly ℏ/2. In standard QM, the inequality follows from the canonical commutation relation [x̂, p̂] = iℏ plus Cauchy–Schwarz applied to variance operators. The argument is short, mechanical, and gives the right answer — but leaves deeper questions unanswered. Why is position–momentum a conjugate pair? Why does the commutation relation hold? Why is the constant in the commutator exactly ℏ? Each points back to structural commitments standard QM postulates: the operators, the commutation relation, the Hilbert space they act on. This walkthrough shows how the Event Density framework derives the structural commitments themselves. The Hilbert space comes from U2 (forced inner product on the participation‑measure space). The momentum operator p̂ = −iℏ∇ comes from Stone’s theorem applied to spatial translation symmetry (U5). The canonical commutation relation [x̂ᵢ, p̂ⱼ] = iℏ δᵢⱼ comes automatically from that operator form. The Fourier conjugacy of position and momentum representations comes from the same Stone identification. Like Bell–Tsirelson, Heisenberg is a place where the framework’s contribution is upstream. The bound itself is mathematical physics — a theorem about Fourier transforms on L² spaces. What the framework adds is forcing the structures the standard argument requires. With Hilbert space, momentum operator, and Fourier conjugacy all derived rather than postulated, the standard Hardy–Folland–Sitaram Fourier‑uncertainty argument applies, and Δx · Δp ≥ ℏ/2 emerges as a derived consequence of substrate ontology, all the way down.
The Uncertainty Constraint from Recursion Admissibility develops an interpretive URT account of the structural origin of the uncertainty bound. The paper does not modify quantum mechanics, introduce new URT operators, or derive the numerical uncertainty constant. Its role is narrower. It examines whether uncertainty can be understood as a boundary condition of joint admissibility when informational compression is applied simultaneously to the state and transition components of a shared recursion event. The paper begins from the canonical URT constraint architecture for compressive updates and treats measurement as an informational compression operation on system description. Within this framing, position-like constraints are mapped to informational state compression, while momentum-like constraints are mapped to informational transition compression. Because both occur within the same recursion event, admissibility is argued to be structurally non-separable across the two compression directions. On that basis, the paper develops a geometric representation of joint admissibility and shows that additive event-capacity interpretations become structurally unstable under shared-event coupling. A local coupled-boundary analysis then supports the viability of a multiplicative complementarity form over state and transition compression. The resulting uncertainty relation is therefore framed not as a prohibition on simultaneous knowledge, but as a structural consequence of URT admissibility applied to a coupled recursion event. The paper stops at the boundary form and leaves the scale of the boundary constant open. Derivation of recursion cadence, minimal recursion action scale, and identification of the boundary constant with the quantum action scale are deferred to the companion URTD development layer. Version 1.1 — Labeling Precision and Metadata Normalization This update applies five targeted corrections identified in an internal audit (Category B — Minor Normalization). No changes to mathematical content, derivations, section ordering, or conclusions. Fix 1 — Category and status metadata corrected: Category changed from INTERPRETIVE to INTERPRETIVE / GEOMETRIC EXTENSION. Status changed from "Structural Hypothesis — Mathematical Derivation Pending" to "Structural Derivation Program Within the URTC Layer." This correction aligns the metadata with the actual content level: the paper now contains formal derivational material (non-separability lemma, local convexity proposition, coupling structure analysis) and should not be classified as a pending hypothesis. The distinction matters for downstream papers that cite this work. Fix 2 — Section 2 retitled as explicit non-formal bridge: Section 2 retitled from "Interpretive Premise: Measurement as Informational Compression" to "Interpretive Premise: Measurement as Informational Compression (Non-Formal Bridge)." The measurement admissibility principle is a separate interpretive program statement. The retitle signals clearly that this section provides interpretive support for the derivation and is not itself part of the formal core. Fix 3 — Möbius-surface visualization labeled explicitly: Added at the opening of Section 6: "Interpretive Note: The Möbius-type surface introduced below is a visualization aid only. It is not a formal geometric derivation and introduces no new operators or topological claims." The label prevents later papers from citing the Möbius passage as formal geometry. Fix 4 — Section 7 retitled and prefaced: Section 7 retitled from "Event Capacity and the Product-Measure Hypothesis" to "Interpretive Product-Measure Hypothesis for the Recursion Event." Added opening sentence: "The product-measure structure introduced below is an interpretive hypothesis, not a URT operator derivation. The event measure μ_event is not a canonical URT operator and must not be treated as such in downstream papers." Fix 5 — Dependency metadata corrected: v8.3_URT_Core_Composite_Synthesis corrected to v8.2_URT_Core_Composite_Synthesis in the Dependencies line. The v8.3 reference was a forward-pointing version error.
A concise derivation of all uncertainty relations is given entirely within the context of phase-space quantization, without recourse to operator methods, to the direct use of Weyl’s correspondence, or to marginal distributions of x and p. Phase-space quantization is the third autonomous and logically complete formulation of quantum mechanics beyond the conventional ones based on operators in Hilbert space or path integrals [1, 2, 3]. It is free of operators and wavefunctions: observables and matrix elements are computed through phasespace integrals of c-number functions (“classical kernels”) weighted by a Wigner function (WF) [4, 3]. This is a phase-space distribution function which is not positive semi-definite, and constitutes the Weyl correspondent [5] of the density matrix in the conventional formulation, fmn(x,p) = 1 2π dye −iyp ψ ∗ m(x − � 2 y)ψn(x + � 2 y) = f ∗ nm(x,p). (1)