Desingularization of the Milne Universe

Krishnan, Chethan and Roy, Shubho (2014) Desingularization of the Milne Universe. In: PHYSICS LETTERS B, 734 . pp. 92-95.

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Abstract

Resolution of cosmological singularities is an important problem in any full theory of quantum gravity. The Milne orbifold is a cosmology with a big-bang/big-crunch singularity, but being a quotient of flat space it holds potential for resolution in string theory. It is known, however, that some perturbative string amplitudes diverge in the Milne geometry. Here we show that flat space higher spin theories can effect a simple resolution of the Milne singularity when one embeds the latter in 2 + 1 dimensions. We explain how to reconcile this with the expectation that non-perturbative string effects are required for resolving Milne. Along the way, we introduce a Grassmann realization of the inonfi-Wigner contraction to export much of the AdS technology to -our flat space computation. (C) 2014 The Authors. Published by Elsevier BAT.

Item Type:	Journal Article
Publication:	PHYSICS LETTERS B
Additional Information:	Copy right for this article belongs to the ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Department/Centre:	Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited:	27 Aug 2014 10:03
Last Modified:	27 Aug 2014 10:03
URI:	http://eprints.iisc.ac.in/id/eprint/49699

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