Authors: A. Schubert
Einstein's elevator remains one of the most iconic thought experiments in physics, illustrating the equivalence principle: an observer inside a sealed elevator cannot distinguish whether the force they experience stems from gravitational attraction or uniform acceleration. This implies a profound connection between inertia and gravitation, traditionally interpreted through the geometry of spacetime in general relativity. However, inspired by Verlinde's entropic gravity proposal (Verlinde et al. 2011), we revisit this connection from a purely classical thermodynamic perspective, reimagining the elevator not just as a geometric construct but as a thermodynamic laboratory.Verlinde suggested that gravity emerges as an entropic force, driven by the statistical tendency of microscopic degrees of freedom to maximize entropy in the presence of mass (Verlinde et al. 2011). While his framework relies on holographic principles and information theory, we propose a simpler, classical alternative: gravity as a thermodynamic response of a system in free fall, modeled as a compact thermometer within the elevator. By focusing on the interplay of energy conservation, dissipative effects, and entropy gradients, we aim to reproduce Newtonian gravity without invoking quantum mechanics or speculative microphysics.Our approach begins with the elevator's equivalence principle as a thermodynamic equivalence. We explore how a classical system, subjected to gravitational acceleration or its inertial counterpart, exhibits internal heating—interpreted as a consequence of energy redistribution akin to the gravitational blueshift of classical waves. This heating drives an entropy gradient, yielding an effective force consistent with Newton's inverse-square law. Unlike previous critiques of entropic gravity. (Kobakhidze et al. 2011,Visser et al. 2011), which highlight quantum inconsistencies or energy conservation issues, our model remains firmly rooted in macroscopic thermodynamics, offering an intuitive and pedagogically valuable reinterpretation of gravitational attraction as a classical emergent phenomenon.
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[v1] 2025-03-28 00:19:47
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