Gravity Reconstruction Under the Nested Universe Paradigm: On the Essence of Gravitons as "Higher-level Geometric Projections"

Abstract: For a long time, the physics community has attempted to achieve the quantization of gravity within a closed, independent spacetime, only to fall into the dual dilemma of "infinite" divergence and the absence of graviton observations. This paper proposes the Nested Universe Theory, arguing that the integrity of the physical laws of our universe must be complemented by the external constraints of a higher-level universe (the parent universe). Under this paradigm, gravity is redefined as a higher-level geometric projection of the parent universe's mass-energy stress onto the boundary of the child universe. This model not only naturally eliminates singularities at microscopic scales mathematically, but also logically demonstrates the non-isolability of gravitons in observations within our universe. This paradigm shift liberates physics from the tight "hanging string" of string theory, leading us into a scientific new continent full of infinite possibilities.