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*From*: Spinozalens@aol.com*Date*: Fri, 29 Jan 2010 16:49:04 EST

The blogs are raging and the commentary runs the gamut from Verlinde is an

incompetent fraud to hailing in a possible revolution in our understanding

of gravity. Of course this has particular interest to me in that I have

posting on the connection between gravity and entropy for a while, mostly in

the context of Dark Energy. Verlinde seems to have made the great leap in

this class of gravity models. Some think he has leaped off into the abyss of

crackpot physics, others that he has uncovered a deep truth about

gravity. However both T Hooft and Smolin think Verlinde is making some sense so

maybe there is something to this. See below.

Bob Zannelli

Newtonian gravity in loop quantum gravity

Authors: _Lee Smolin_

(http://arxiv.org/find/gr-qc/1/au:+Smolin_L/0/1/0/all/0/1)

(Submitted on 20 Jan 2010)

Abstract: We apply a recent argument of Verlinde to loop quantum gravity,

to conclude that Newton's law of gravity emerges in an appropriate limit

and setting. This is possible because the relationship between area and

entropy is realized in loop quantum gravity when boundaries are imposed on a

quantum spacetime.

_http://arxiv.org/PS_cache/arxiv/pdf/1001/1001.3668v1.pdf_

(http://arxiv.org/PS_cache/arxiv/pdf/1001/1001.3668v1.pdf)

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