Electron Orbitals as Stationary Δf Resonance Corridors

Abstract

This document develops an operational bridge between established atomic quantum mechanics and the geometric language of USP Field Theory. The standard predictive framework is preserved without modification. Atomic orbitals remain stationary solutions of the Schrödinger or Dirac equations, with quantum numbers, nodal structure, angular momentum, spin, antisymmetrization, Pauli exclusion, transition amplitudes, relativistic effects, quantum-electrodynamic corrections, and detector response forming the quantitative baseline. USP Field Theory adds a constrained interpretation in which a bound one-electron state is treated as an extended stationary resonance-corridor mode. A positive anchored energy-density map is defined as: u_a(r) = κ_a |ψ_a(r)|² where the normalization anchor must be explicitly declared. The paper removes the earlier image of a small electron loop travelling along an orbital-shaped path. Orbital lobes are not trajectories or separate electron fragments. They represent spatial regions of a stationary quantum state. The opposite colors commonly used in orbital diagrams indicate the sign or phase of the wavefunction. They do not represent positive and negative probability, matter, charge, or energy. The measurable density remains non-negative: ρ_orb(r) = |ψ(r)|² ≥ 0 The document preserves the standard subshell capacities: N_max = 2(2ℓ + 1) giving the familiar capacities 2, 6, 10, and 14 for the s, p, d, and f families. These values follow from the standard magnetic and spin quantum numbers together with Pauli exclusion. They are not presented as an independent USP derivation. The orbital interpretation is organized through five claim levels: Level A — established quantum and atomic physics Level B — operational translations and calibrated proxies Level C — orbitals interpreted as stationary resonance corridors Level D — testable residuals with exact null A_USP = 0 Level E — a future microscopic derivation from fundamental USP variables The document introduces two possible operational Δf proxies. An energy-residual proxy: Δf_op = [V_eff(r) − E_a] / h and a Coulomb binding scale: Δf_C(r) = |V_C(r)| / h These are frequency-equivalent bookkeeping coordinates, not directly observed local oscillations. Photon frequency, geometric frequency, detector bandwidth, orbital frequency, and Coulomb energy divided by h must not be mixed without a declared calibration map. Hydrogenic 1s and 2p_z states are used as examples. Nodes are interpreted as zero-support surfaces of the stationary mode, while phase reversal across a node is kept distinct from the non-negative density. The paper also separates one-electron orbitals from many-electron atomic densities. In correlated atoms, orbitals may depend on the chosen representation, whereas total densities, energies, transition amplitudes, and measured observables are more directly physical. Atomic emission is treated through a source–path–detector architecture: Prepared atomic state → transition source → propagation and medium response → detector and analysis response This prevents spectral or imaging residuals from being assigned to orbital geometry before known environmental and instrumental effects are included. High-Z spectroscopy is retained as a possible test domain, but only after the complete relativistic, QED, electron-correlation, nuclear, recoil, external-field, source, and detector baselines have been modeled. A generic residual model is written as: μ = μ₀ + A_USP F_USP with the exact standard null: A_USP = 0 Any USP residual must be calibrated on one dataset and tested without retuning on held-out atoms, transitions, isotopes, instruments, or atomic-number ranges. The strongest conclusion of the document is: Atomic orbital = standard stationary quantum state + USP resonance-corridor interpretation not: Atomic orbital = classical electron path