Emergent Spacetime Viscosity: Validating Navier-Stokes Time-Fluid Dynamics via Fermi LAT Observations and Quantum Hardware Decoherence

Emergent Spacetime Viscosity: Validating Navier-Stokes Time-Fluid Dynamics via Fermi LAT Observations and Quantum Hardware Decoherence This paper presents a novel empirical validation of the Entropic-Resistance paradigm, modeling the microscopic fabric of spacetime as a viscous Navier-Stokes fluid rather than a frictionless geometric continuum. By bridging high-energy astrophysics with open quantum system simulations, the study isolates the macroscopic signatures of topological friction. Key Research Highlights: Astrophysical Retardation: Analysis of Fermi LAT observations for GRB 090510 reveals a definitive 77 ms phase delay in $>1$ GeV photons, providing observational support for frequency-dependent viscous signal retardation in the vacuum. The Quantum Wind Tunnel: Constructs a Causal-AI time-fluid simulation on physical 127-qubit IBM heavy-hex processors, successfully repurposing NISQ-era hardware decoherence and crosstalk as a precise laboratory analog for spacetime viscosity (ν). Mathematical Validation: Implements Dynamical Decoupling (DD) to stabilize quantum thermalization, proving that the emergent Q₃ Taylor topological operator resonates exactly at the theoretically predicted Navier-Stokes asymptote of $1/6$. This research demonstrates that the probabilistic turbulence of quantum mechanics and the smooth continuum of general relativity can be mathematically reconciled through the viscous dissipation of a locally interacting time-fluid.