Fakultät für Physik und Astronomie
STEPHEN PHILLIPS hostreviews.co.uk / UNSPLASH

Gravity emerging from entropy?

Matthias Bartelmann

A recent paper by E. Verlinde on emerging gravity (https://arxiv.org/abs/1611.02269) has attracted considerable attention because he claims there that entropy density is a primary characteristic of space-time rendering space-time elastically responsive to the presence of matter. If gravity should indeed emerge as an effect of the entropy content of space-time, the gravitational law must be modified in a way similar to Modified Newtonian Dynamics, thus potentially avoiding dark matter. In the talk, I will review Verlinde's main arguments and describe his derivation of a modified gravitational law. Recent measurements testing this modification arrive at mixed conclusions.

ITA "blackboard" Colloquium
12 Jun 2017, 11:15
Philosophenweg, 12, 106

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