Thermodynamic Asymmetry from Projection: A Geometric Framework for Time’s Arrow and Entropy Emergence

We present the Thermodynamic Asymmetry from Projection (TAP) model, a theoretical framework proposing that the arrow of time and entropy increase emerge not from probabilistic laws or initial conditions, but from geometric constraints imposed by the projection of high-dimensional coherent information into a lower-dimensional spacetime. In TAP, entropy is reformulated as a local mismatch between the representational capacity of a projection surface and the density of incoming informational flux, offering a deterministic and geometric origin for temporal asymmetry. The model introduces dimensional causality, whereby classical physical laws, decoherence, and macroscopic irreversibility arise from structured projectional breakdown. Gravity and inertia are likewise reinterpreted as manifestations of projectional curvature and consistency conditions. TAP accounts for phenomena such as big bang and black hole termination, quantum-to-classical transition, and large-scale cosmological anisotropies—including features in the cosmic microwave background (CMB) like the Cold Spot and axis alignments. The framework yields testable predictions, including the entropy ground state after black hole evaporation and information-aligned anomalies in the CMB. By linking thermodynamics, relativity, and quantum theory under a unified projectional geometry, TAP offers a novel perspective on the origin of physical law and the visible structure of the universe.