On a Geometric Origin of Electromagnetism in Teleparallel Spacetime

A teleparallel framework is presented in which electromagnetism admits a geometric realization alongside gravitation. In this construction, gravity and electromagnetism arise as complementary dynamical sectors of a single tetrad field, rather than as independent structures. The electromagnetic potential is not introduced as an internal gauge field appended to spacetime, but is identified with the dynamical structure of the temporal tetrad. In this parametrization, the electromagnetic potential arises as part of the geometric decomposition of the temporal coframe, while U(1) gauge symmetry appears as a redundancy in the representation of temporal geometry rather than as an independently postulated internal symmetry. The electromagnetic field strength emerges from temporal torsion, while the U(1) gauge symmetry is realized as a geometric equivalence relation among different representations of temporal geometry. Local Lorentz covariance is preserved throughout.Standard electromagnetic dynamics are recovered without additional assumptions: the homogeneous Maxwell equations follow as geometric identities, while the inhomogeneous equations, charge conservation, and the Lorentz force law arise from a unified action principle. Flat Minkowski spacetime remains a stable vacuum solution, and classical configurations such as the Coulomb field admit a direct interpretation as spatial variations of temporal geometry. Electromagnetic backreaction is understood as an intrinsic change of the underlying geometric structure rather than as an external source.Beyond formal consistency, the framework allows direct contact with observations. In particular, the pulsar braking index problem is revisited from a geometric perspective. A drift component of the tetrad encodes a geometric vorticity of spacetime, leading to an additional torque linear in the angular velocity. Deviations of the braking index from the standart value n=3 then arise as a direct geometric effect, without invoking phenomenological torque corrections or detailed magnetospheric modeling.