Thermodynamic Vacuum Cosmology Framework (TVCF): A Unified Thermodynamic Approach to Cosmological Vacuum Dynamics

This repository presents the Thermodynamic Vacuum Cosmology Framework (TVCF), a structured research program exploring a thermodynamic interpretation of cosmological vacuum dynamics. The framework is formulated as a minimal thermodynamic extension of the standard ΛCDM cosmology in which the vacuum energy evolves with the expansion rate of the Universe through horizon-related thermodynamic processes. Within this perspective, the cosmological vacuum is treated as a macroscopic thermodynamic system capable of exchanging energy with the matter sector. This leads to modified cosmological dynamics with potentially observable consequences in the expansion history and the growth of cosmic structures. The repository includes:- conceptual foundations of thermodynamic gravity- cosmological background dynamics derived from vacuum–matter interaction- linear perturbation theory for structure formation- predictions for cosmological observables (distances, BAO, structure growth)- numerical implementation procedures- likelihood frameworks for observational constraints- weak-field galactic phenomenology The framework is not presented as a finalized cosmological theory but as a mathematically explicit and testable research program designed to explore the role of vacuum thermodynamics in cosmology. All documents are organized as a unified and coherent theoretical structure intended for researchers in cosmology, gravitational physics, and thermodynamic approaches to spacetime.