On the Heisenberg Uncertainty Principle as a Measurement-Resolution Effect: A Two-Stage Temporal Interpretation Compatible with Quantum Mechanics

The Heisenberg uncertainty principle is typically interpreted as expressing an irreducible indeterminacy of nature. This paper does not challenge that interpretation as a theorem of quantum mechanics. Instead, it proposes that in many experimental contexts, the observed uncertainty budget is dominated by an additional contribution arising from finite temporal resolution — and that this contribution can be separated, modeled, and tested. We construct a two-stage temporal measurement framework in which quantum measurements are modeled as effective processes involving unresolved internal dynamics at timescales far below current detector resolution. The measured uncertainty decomposes into two components: intrinsic state variance (constrained by the Robertson-Schrödinger relation, unchanged) and resolution-dependent variance (arising from temporal coarse-graining of fast internal dynamics). In the ideal limit of infinite resolution, the resolution contribution vanishes and standard quantum uncertainty is recovered exactly. The framework preserves all of quantum mechanics: canonical commutation relations, operator algebra, Born rule, state evolution, and Bell-type correlations are entirely unchanged. This is not a hidden-variable theory, not a modification of quantum mechanics, and not an attempt to evade Bell's theorem. It is a measurement-theoretic interpretation providing a mechanistic picture of how uncertainty emerges at the interface between physical dynamics and finite-bandwidth detection. A weak but testable prediction emerges: measured uncertainty variances should show systematic dependence on the effective temporal resolution of the measurement apparatus. Candidate experimental systems include ultrafast homodyne detection with variable bandwidth, atomic interferometry with controlled gating, time-tagged single-photon detection with variable coincidence windows, and optical atomic clocks with adjustable interrogation times. An appendix connects the framework to the fractal-temporal Lagrangian, where the characteristic internal timescale τ* is identified with the vibrational electron period Tₑ ≈ 5. 7 × 10⁻²¹ s (derived from the Lagrangian, not fitted), and log-periodic structure in the resolution dependence is predicted with period ln√2.