This paper extends the Scalar Temporal Field Ontology (STFO) to quantum information processing, showing that fluctuations of the temporal scalar field τ(xμ) can passively mitigate qubit error rates by altering phase accumulation and suppressing environmental noise. Qubits couple to τ via L_int = −γτ Jμ ∂μ τ, producing:(1) spectral filtering of dephasing channels through τ-exchange,(2) exponential suppression of effective phase noise Γ_eff = Γ_0 exp[−γτ² Var(Δτ)/2], and(3) direction-dependent coherence enhancement aligned with ∇τ. Integrating out τ-fluctuations yields an effective noise kernel Kτ(ω) = γτ² ω² / (ω² + q² + mτ²), suppressing high-frequency noise while stabilizing low-frequency drift through gradient alignment. This leads to longer effective T₂ times without requiring active error correction. We derive the associated kernel, coherence scaling laws, qubit-gradient angle dependence, and propose diagnostic sequences including CPMG, Ramsey drift scans, and noise spectroscopy around ω ~ mτ. Applications to superconducting qubits, trapped ions, and neutral-atom platforms are discussed. This work suggests STFO provides a universal, passive error-mitigation layer for quantum hardware.