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|Title:||A no-go theorem for accelerating cosmologies from M-theory compactifications||Authors:||Teo, E.||Issue Date:||10-Mar-2005||Citation:||Teo, E. (2005-03-10). A no-go theorem for accelerating cosmologies from M-theory compactifications. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 609 (3-4) : 181-186. ScholarBank@NUS Repository. https://doi.org/10.1016/j.physletb.2005.01.064||Abstract:||It is known that four-dimensional cosmologies exhibiting transient phases of acceleration can be obtained by compactifications of low-energy effective string or M-theory on time-varying manifolds. In the four-dimensional theory, the acceleration can be attributed to a quintessential scalar field with a positive effective potential. Recently, Townsend has conjectured that the potentials obtained by such compactifications cannot give rise to late-time accelerating universes which possess future event horizons. Such a 'no-go' result would be desirable, since current string or M-theory seems unable to provide an adequate description of space-times with future event horizons. In this Letter, we provide a proof of this conjecture for a class of warped compactifications with a single scalar modulus parametrising the volume of the compactification manifold. © 2005 Elsevier B.V. All rights reserved.||Source Title:||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics||URI:||http://scholarbank.nus.edu.sg/handle/10635/95654||ISSN:||03702693||DOI:||10.1016/j.physletb.2005.01.064|
|Appears in Collections:||Staff Publications|
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