Gravitation and the Foundations of the Theory of Entropicity (ToE): Making Sense of It All
Entropy isn't typically a field like gravity in standard physics, but emerging theories treat it as one by linking it to spacetime geometry and quantum information. These ideas make conceptual sense by viewing gravity itself as arising from entropy gradients, resolving unification challenges.
Entropic Gravity Basics
Entropic gravity, proposed by Erik Verlinde, posits gravity as an emergent force from entropy changes, akin to how elasticity emerges from molecular disorder in rubber. Objects move to maximize entropy in a holographic screen of information bits on spacetime surfaces, mimicking Newton's law without fundamental gravitons.[3]
Bianconi's Quantum Entropy Theory
Ginestra Bianconi's recent work derives gravity from "quantum relative entropy," measuring disorder differences between quantum states of spacetime and matter. Spacetime acts as a quantum operator; entropy gradients couple matter fields to geometry, yielding Einstein's equations plus a small cosmological constant for cosmic expansion.[1][5][7]
Field-Like Formulation
The theory introduces a G-field (gravitational vector field with magnitude and direction) as a Lagrangian multiplier, optimizing wave functions amid entropy variations. This field influences spacetime like gravity does, emerging from quantum info dissimilarity—gravity isn't curvature alone but an entropic response, potentially explaining dark matter as particle-like G-field excitations.[1][7]
Physical Intuition
Counterintuitively, gravity increases total entropy (e.g., gas collapsing to a hot planet radiates photons, boosting disorder elsewhere) despite local clumping. Entropy as a field scalar (like a density) or via its gradient drives motion, much as the Higgs field endows mass—it's "physical" because it enforces the second law across quantum scales.[2][4]
Citations:
[1] A New Theory Says Gravity May Come From Entropy— ... https://www.popularmechanics.com/science/a64069299/gravity-entropy-unified-theory/
[2] Entropy vs gravity : r/AskPhysics https://www.reddit.com/r/AskPhysics/comments/1c7gefo/entropy_vs_gravity/
[3] Entropic gravity https://en.wikipedia.org/wiki/Entropic_gravity
[4] Is gravity the opposite of entropy? https://www.reddit.com/r/AskPhysics/comments/14wjp5s/is_gravity_the_opposite_of_entropy/
[5] Gravity from entropy: New theory bridging quantum mechanics ... https://www.firstprinciples.org/article/gravity-from-entropy-new-theory-bridging-quantum-mechanics-and-relativity
[6] Gravity is Entropy is Gravity is... http://backreaction.blogspot.com/2010/03/gravity-is-entropy-is-gravity-is.html
[7] A New Theory Says Gravity May Come From Entropy— ... https://www.popularmechanics.com/science/a70060000/gravity-from-entropy-unified-theory/
[8] What is "entropic gravity"? https://curtjaimungal.substack.com/p/what-is-entropic-gravity
[9] Gravity is not an entropic force https://www.sciencedirect.com/science/article/pii/S0370269325008962
[10] What if gravity is caused by entropy? https://www.reddit.com/r/HypotheticalPhysics/comments/1j61xdn/what_if_gravity_is_caused_by_entropy/