Singularity Resolution via Relativistic Spin Hydrodynamics: A Proposed Deterministic Framework for Einstein–Rosen Bridges

We present a mechanism to resolve curvature singularities relying strictly on the Standard Model within a conventional 4D spacetime manifold. By treating the quark-gluon plasma (QGP) within the framework of second-order relativistic spin hydrodynamics, we propose that the divergence of resonant bulk viscosity near the QCD phase transition, coupled with the minimal Einstein-Cartan spin-torsion interaction, provides a hydrodynamic mechanism for geodesic completeness. We show that the Chiral Battery mechanism creates a population inversion of spin states, driving the core into a spin-thermodynamic Negative Absolute Temperature regime. This generates a stabilizing spin-torsion geometric stiffness that arrests the collapse into a stationary, supersolid Einstein-Rosen bridge, satisfying the generalized Israel junction conditions while preserving global unitarity and information conservation. The resulting solution describes a regular, non-singular interior geometry consistent with a deterministic, globally hyperbolic spacetime. ----- Version 2.0 Change Log: • Title Update: Broadened to "Singularity Resolution via Relativistic Spin Hydrodynamics" to encompass the Einstein-Cartan geometry, while retaining QCD bulk viscosity as the driving mechanism. • New Mechanisms: Added the Chiral Battery and Color-Flavor-Locked (CFL) Supersolid phase as the primary stabilizing structures. • Observational Signatures: Added Section 5 detailing predictions for LIGO (gravitational wave echoes) and JWST (Little Red Dots/super-Eddington growth). • Bibliography: Expanded references from 7 to 39, adding foundational citations (Onsager, Kubo) and specific non-singular black hole models (Hayward 2006). • Formatting: Upgraded to professional two-column physical journal layout.