○Erik P. Verlinde published 51 papers on-line November 7, 2016. In this paper, entropic gravity is said to be able to explain " Galaxy rotation curve problem". [1]
※A significant discrepancy exists between the experimental galaxy rotation curves observed, and a curve derived from theory. The theory of dark matter was postulated to account for the variance. [2]
○And in this paper he provides evidence for the fact that the observed dark energy and the phenomena currently attributed to dark matter have a common origin and are connected to the emergent nature of spacetime and gravity. [1]
○The first indication of the emergent nature of spacetime and gravity comes from the laws of black hole thermodynamics. A central role herein is played by the Bekenstein-Hawking entropy [2, 3] and Hawking temperature given by [1]
Here A denotes the area of the horizon and κ equals the surface acceleration.
○Discussion result
１）The positive dark energy and accelerated expansion are caused by the slow thermalization of the emergent spacetime. [1]
2) The observed phenomena that are currently attributed to dark matter are the conesquence of the emergent nature of gravity and are caused by an elastic response due to the volume law contribution to the entanglement entropy in our universe. [1]
3) Dark matter is not a collection of invisible particles but a result of the interaction of ordinary matter and dark energy. [3]
4) It is still an open question if and how the standard cosmological picture is incorporated in a theory of emergent gravity. [1]
○In order to verify this theory and to obtain a definite answer, firstly progress of observation and theory is desired.
【References】
1. Erik P. Verlinde “Emergent Gravity and the Dark Universe” 20161107
https://arxiv.org/abs/1611.02269
2. Galaxy rotation curve - Wikipedia
3.“「暗黒物質」は存在しない？ 大胆な仮説を提唱した物理学者の長き闘い ...”at WIRED 20170402
https://wired.jp/2017/04/02/case-dark-matter/
【Change log】
20171112 New description
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