New lensing signatures tied to torsion and vorticity.
Future precision cosmology missions are well poised to falsify or confirm this model, making it both theoretically rich and observationally grounded.
6. Cosmological Interpretation and Multiverse Interaction
The previous sections have established a dynamically viable, observationally testable model of a rotating, torsion-driven universe within Einstein--Cartan--Bianchi IX cosmology. This section shifts focus toward interpretative and foundational questions: What does a rotating, torsion-filled, hyperspherical universe imply for our understanding of spacetime, cosmological constant, and the multiverse? Can such a framework offer a unifying thermodynamic and quantum description of early-universe phenomena?
6.1 External Torsion and Vacuum Energy Compensation
One of the deepest puzzles in theoretical cosmology is the cosmological constant problem---the discrepancy between the observed value of vacuum energy density and the theoretically predicted value from quantum field theory (QFT), which exceeds it by ~120 orders of magnitude.
In the Einstein--Cartan framework:
Torsion is not a propagating field, but rather a local algebraic response to spin.
However, if the universe is embedded in a higher-dimensional or multiversal background, it is plausible that effective torsion arises not from internal spin alone, but from external angular momentum exchange, akin to boundary-driven vorticity in rotating fluids.
We propose that:
A small residual torsion field, sourced from a neighboring "layer" or sector in a higher-dimensional configuration (e.g., a multiverse foliation), contributes a negative pressure component that compensates vacuum energy at cosmological scales.
