Proposal: Thermodynamic Holographic Reciprocity (THR)

There is a duality between information capacity of causal boundaries (horizons, light cones, null surfaces) and irreversible entropy production in their interior. In particular: Every irreversible entropy increase in a region is accompanied by a proportional “informational compensation” encoded on the region’s causal boundary, such that the boundary’s information content must shift in a consistent dual way. Reversals or “undoing” of internal entropy must be matched by adjustments in boundary encoding, making perfect reversal impossible unless global boundary states also reverse.