２９ Entropic gravity／Emergent gravity

２９　Entropic gravity／Emergent gravity

○Entropic gravity, also known as emergent gravity, is a theory in modern physics that describes gravity as an entropic force. [1]

○In 2009, Erik Verlinde disclosed a conceptual model that describes gravity as an entropic force. He argues (similar to Jacobson's result) that gravity is a consequence of the "information associated with the positions of material bodies". This model combines the thermodynamic approach to gravity with Gerard 't Hooft's holographic principle. It implies that gravity is not a fundamental interaction, but an emergent phenomenon which arises from the statistical behavior of microscopic degrees of freedom encoded on a holographic screen. [1]

○The theory holds that when gravity becomes vanishingly weak—levels seen only at interstellar distances—it diverges from its classically understood nature and its strength begins to decay linearly with distance from a mass. [1]

○From this theory it is not necessary to assume dark matter.

○The theory has been controversial within the physics community but has sparked research and experiments to test its validity. [1]

【Referendes】
1. Entropic gravity－Wikipedia 




【Change log】
20171111　Newly posted