π Universe: The Ultimate Criterion of Physics Based on the Global Quantization of the λ Field

Current theoretical physics faces two core dilemmas: first, the fundamental incompatibility between general relativity and quantum mechanics, with no mature quantum gravity theory established yet; second, the ΛCDM standard cosmological model relies on multiple ad-hoc assumptions, suffering from the fine-tuning disaster of the cosmological constant, unknown nature of dark matter and dark energy, baryon asymmetry, and a series of unsolved problems. Existing quantum gravity candidates (string theory, loop quantum gravity, asymptotic safety gravity, etc.) still suffer from lack of verifiable predictions, incomplete connection with the low-energy Standard Model of particle physics, and background dependence. This paper proposes the Quantum Collapse Cosmology framework, taking the complex coherence order parameter λ-field of vacuum quantum fluctuations as the only physical ontology of the universe. We construct a completely background-independent non-perturbative topological quantum field theory, where spacetime, gravity, matter, and fundamental interactions are all derived quantities of the coherent structure of the λ-field, with no prior background assumptions or extra free fitting parameters. Starting from the topological invariant action of the λ-field, this framework strictly derives the 4-dimensional flat Minkowski spacetime and the low-energy effective Einstein-Hilbert gravitational action, realizing background-independent compatibility between quantum gravity and general relativity. Based on functional renormalization group analysis, we prove that 4-dimensional spacetime is the only inevitable result for the self-consistent existence and asymptotic safety of the gravity-λ-field coupled system. Through the renormalization group trace anomaly cancellation mechanism, we naturally solve the cosmological constant fine-tuning disaster, giving an effective dark energy density matching observational data. Based on the topological soliton solutions of the λ-field, we explain the origin of baryon asymmetry and the physical nature of dark matter. Without extra free parameters, we derive fundamental physical constants such as the fine-structure constant and Higgs mass, which are highly consistent with experimental measurements. This framework constructs a unified framework for quantum gravity and cosmology, and also provides 8 quantitative falsifiable predictions: including Higgs boson mass, 6 specific sky regions of CMB polarization anomalies, LIGO gravitational wave phase noise, laboratory equivalence principle violation, and dark matter semi-coherent state characteristics, with strong experimental testability. This framework provides a self-consistent, concise, and testable exploration scheme for the core dilemmas of quantum gravity and cosmology, while clarifying the applicable boundaries and open research problems of the theory. (A full Chinese version of this work is included as an additional file.)