The Wormhole Wall: A Theoretical Framework for the Temporary Closure of Natural Wormholes Using Exotic Matter Barriers and Space-Time Stability Triggers

Natural wormholes, if they exist, are solutions to Einstein’s field equations, forming shortcuts through spacetime. However, such wormholes may pose risks to cosmic stability and security, necessitating controlled closure mechanisms. This paper proposes the concept of a "wormhole wall", a structure composed of high-energy spacetime distortions, exotic matter fields, and topological defects designed to temporarily seal a naturally occurring wormhole. The closure duration ranges from thousands to millions of years, with reopening triggered only by cosmic-scale spacetime disturbances, such as vacuum decay, black hole mergers, or gravitational wave singularities. We examine the physics behind such a barrier, the properties of the materials required, and the conditions under which the wormhole would reopen. The study also explores the spacetime curvature effects of the closure mechanism, explaining why a wormhole typically exhibits a narrow entrance, wide throat, and narrow exit, commonly described as a "tummy shape". Theoretical models and mathematical formulations are provided to establish conditions for closure and reopening, supported by diagrams illustrating the effects of various closure methods.