On entropic gravity: the entropy postulate, entropy content of screens and relation to quantum mechanics

Details On entropic gravity: the entropy postulate, entropy content of screens and relation to quantum mechanics On entropic gravity: the entropy postulate, entropy content of screens and relation to quantum mechanics

2011-09-13

arxiv.org/abs/1109.2794v1

Physics

High Energy Physics

High Energy Physics - Theory

14 pages

Scientific paper

We consider the controversial hypothesis that gravity is an entropic force that has its origin in the thermodynamics of holographic screens. Several key aspects of entropic gravity are discussed. In particular, we revisit and elaborate on our criticism of the recent claim that entropic gravity fails to explain observations involving gravitationally-bound quantum states of neutrons in the GRANIT experiment and gravitationally induced quantum interference. We argue that the analysis leading to this claim is troubled by a misinterpretation concerning the relation between the microstates of a holographic screen and the state of a particle in the emergent space, engendering inconsistencies. A point of view that could resolve the inconsistencies is presented. We expound the general idea of the aforementioned critical analysis of entropic gravity in such a consistent setting. This enables us to clarify the problem and to identify a premise whose validity will decide the faith of the criticism against entropic gravity. It is argued that in order to reach a sensible conclusion we need more detailed knowledge on entropic gravity. These arguments are relevant to any theory of emergent space, where the entropy of the microscopic system depends on the distribution of matter in the emergent space.

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