This work develops a cosmological framework in which spacetime geometry is not fundamental, but emerges as an effective, coarse-grained description of a finite-response medium described by the Emergent Condensate Superfluid Medium (ECSM). Within this framework, gravity, inertia, and light propagation arise from a unified set of local response laws governed by density, coherence, and relaxation timescales. In the coherent limit, the standard metric description of general relativity is recovered as an effective parametrization of the medium response, reproducing null geodesics and classical gravitational dynamics. At finite coherence, deviations arise due to medium-dependent propagation and relaxation effects, leading to controlled, scale-dependent modifications of gravitational lensing and signal transport. The framework predicts a set of observable signatures, including suppression of weak gravitational lensing relative to structure growth, scale- and redshift-dependent decorrelation between convergence and shear observables, and phase-dependent modifications to cosmological power spectra. These effects cannot be reproduced by simple geometric rescalings within standard cosmology. This approach provides a unified effective description of gravitational and cosmological phenomena without introducing additional fields or modifying fundamental equations, instead reinterpreting them as emergent consequences of finite-response dynamics in a continuous medium.
Adam Sheldrick (Sun,) studied this question.