I noticed this on arxiv today. It is by a legitimate academic researcher and it MAY be reasonable for all I know. I can't judge. She is at the UNC-Chapel Hill department of Physics and Astronomy. But my initial impression is weirdness. I would like to be able to go to sleep tonight confident that it is OK to ignore this paper. Anybody want to dispose of it?(adsbygoogle = window.adsbygoogle || []).push({});

http://arxiv.org/abs/gr-qc/0609006

The Arrow of Time Forbids a Positive Cosmological Constant [itex]\Lambda[/itex]

Laura Mersini-Houghton

6 pages

"Motivated by the mounting evidence for dark energy, here we explore the consequences of a fundamental cosmological constant [itex]\Lambda[/itex] for our universe. We show that when the gravitational entropy of a pure DeSitter state ultimately wins over matter, then the thermodynamic arrow of time in our universe must reverse in scales of order a Hubble time. This phenomenon arises from the gravitational instabilities that develop during a DeSitter epoch and turn catastrophic. A reversed arrow of time is clearly in disagreement with observations. Thus we are led to conclude: Nature forbids a fundamental [itex]\Lambda[/itex]. Or else general relativity must be modified in the IR regime when [itex]\Lambda[/itex] dominates the expansion of the Universe."

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# Please shoot this, somebody (Laura Mersini-Houghton paper)

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