Scale-Invariant Sub-Planckian Field Towers as a Two-Stage Resolution to the Cosmological Constant Problem and Hubble Tension

We propose a novel two-stage framework to address the cosmological constant problem and the ongoing Hubble tension. By introducing scale-invariant sub-Planckian field towers, the model demonstrates how infinite field cancellations suppress vacuum energy density at quantum scales while topological instanton horizon tunneling accounts for late-time cosmic expansion discrepancies. This work formalizes the mathematical underpinnings, field dynamics, and observational implications of the model, offering a self-consistent mechanism without fine-tuning