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This preprint develops a mathematical framework connecting the space-time geometry of Schrödinger wave packets with time-averaged quantum localization probabilities. It introduces a dimensionless multiscale concentration coefficient designed to quantify tube clustering across scales and derives a geometric-to-quantum localization inequality separating geometric concentration, mean occupancy, incoherent packet energy, and controlled wave-packet tails.

The framework is calibrated using a classical Córdoba-type estimate for a restricted direction-uniform tube family, providing a sharp benchmark within that model. The paper also discusses an application to freely propagating Gaussian matter-wave packets and finite-detector occupancy.

This is a preprint version submitted for consideration for publication in Reports on Mathematical Physics.