Thermodynamic Constraints on Measurement Events: A Boundary Framework for Classical Information

We propose that measurement is not a mathematical abstraction but a physical event (a “Boundary Event”) that converts quantum uncertainty into classical certainty. This conversion requires a strict thermodynamic price of at least k_B T ln 2 of heat per bit, as required by Landauer’s principle. This framework provides a thermodynamic explanation for the Born rule: the probability P = |ψ|² arises from the cost of erasing the sign distinction (±ψ) when creating irreversible classical information. The squaring operation is not a mathematical postulate but a thermodynamic transaction that pays to eliminate redundant quantum pathways. We show that the accumulated classical information from irreversible measurements determines the geometry of spacetime, and that the exact relationship T_H S_{BH} = 1/2 M c² for black holes reveals a complete thermodynamic cycle: measurement creates classical information by paying thermodynamic cost, while black holes destroy classical information and return that cost as Hawking radiation. The factor of 1/2 arises because creating one bit of classical information requires eliminating one bit of quantum uncertainty, and both operations have equal energy content. The framework extends to forces by introducing a Boundary Event Potential Φ whose gradient gives rise to all fundamental interactions- inertia, electromagnetism, strong, weak, and gravity- as emergent phenomena minimizing thermodynamic cost. Concrete falsifiable predictions include measurement calorimetry, force-gradient calorimetry, strong-force information-cost scaling, weak-force broadcast-efficiency dependence, and Hawking-Landauer verification.