Spatial Distortion Field Theory: A Novel Classical Coupling Mechanism for Gravity and Electromagnetism

Based on the physical hypothesis that spatial distortion is the common origin of gravity and electromagnetism, this paper constructs a self-consistent classical effective field theory framework. The locally conserved total spatial distortion is partitioned into two evolutionary forms: geometric conduction (gravitational channel) and temporal dispersion (electromagnetic channel). A dimensionless topological compression ratio, denoted as η∈[0,1), is introduced as the sole regulating parameter for channel allocation. Three fundamental field variables are defined: the right-handed net redundant light field density ρR, the degree of time twist Θt, and the information impedance ℛ. A global action is then constructed, incorporating the geometric term for gravity, the classical term for electromagnetism, and a gravity-electromagnetic coupling term. The theory strictly satisfies the correspondence principle: the limit η→1 reduces to General Relativity, while the η→0 limit recovers Maxwell's electromagnetism. In the mixed coupling regime where 0<η<1, the theory yields three quantitatively testable physical effects: an additional precession of 5%–15% for strongly magnetized compact objects, a scalar polarization component in gravitational waves from compact binary mergers constituting ≲2% of the energy, and a redshift evolution of dynamic dark energy on cosmological scales. This paper explicitly restricts its scope to classical long-range interactions, offering a novel, self-consistent, and falsifiable effective field theory approach towards the unification of gravity and electromagnetism.