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- W2045576253 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." @default.
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- W2045576253 date "2005-03-01" @default.
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- W2045576253 title "A no-go theorem for accelerating cosmologies from M-theory compactifications" @default.
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- W2045576253 doi "https://doi.org/10.1016/j.physletb.2005.01.064" @default.
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