Thermal Degradation of Bell-CHSH Violation in the Ether Framework: A Parameter-Free Algebraic Prediction Distinguishable from Quantum Decoherence

We derive a parameter-free prediction for the temperature dependence of Bell-CHSH correlations within a framework in which quantum entanglement is mediated by the zero-point field of a physical ether modelled as a superfluid quantum condensate. At temperature T, the CHSH parameter degrades algebraically as |S (T) | = 2√2/ (1 + 2nₜh) ², where nₜh is the Bose-Einstein thermal occupation number. This prediction has zero free parameters and differs qualitatively from standard Lindblad decoherence (exponential, one free parameter). We propose a ratio test R (T₁, T₂) that discriminates between the two predictions with a single measurement at two temperatures. For 10 GHz microwave photons: R = 4. 86. The experiment is feasible with existing superconducting circuit technology. Explicit falsification criteria are provided.