Topological Condensation of Vacuum:A Geometric Variational Model of the Electron as a Static 4\pi Torsion Knot

We propose a geometric model in which the electron is a static topologicalsoliton of vacuum: a closed toroidal configuration whose energy is storednot as circulating electromagnetic flow on the surface, but as a 4\pitorsion-twisted vacuum core. A small fraction of the localized energyappears externally as boundary stress, interpreted phenomenologically aselectric charge. A variational functional is introduced on a toroidal coreregion, combining an electromagnetic contribution and an effective torsionalstiffness term, subject to a global action quantization constraint.