Tensor modes on the string theory landscape

38 mins 35 secs, 535.28 MB, MPEG-4 Video 640x360, 29.97 fps, 44100 Hz, 1.84 Mbits/sec

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Description:	Westphal, A (Deutsches Elektronen-Synchrotron) Wednesday 27 June 2012, 11:20-11:55


Created:	2012-07-04 15:08
Collection:	Mathematics and Applications of Branes in String and M-theory
Publisher:	Isaac Newton Institute
Copyright:	Westphal, A
Language:	eng (English)


Abstract:	We attempt an estimate for the distribution of the tensor mode fraction r over the landscape of vacua in string theory. The dynamics of eternal inflation and quantum tunneling lead to a kind of democracy on the landscape, providing no bias towards large-field or small-field inflation regardless of the class of measure. The tensor mode fraction then follows the number frequency distributions of inflationary mechanisms of string theory over the landscape. We show that an estimate of the relative number frequencies for small-field vs large-field inflation, while unattainable on the whole landscape, may be within reach as a regional answer for warped Calabi-Yau flux compactifications of type IIB string theory.

Abstract:

We attempt an estimate for the distribution of the tensor mode fraction r over the landscape of vacua in string theory. The dynamics of eternal inflation and quantum tunneling lead to a kind of democracy on the landscape, providing no bias towards large-field or small-field inflation regardless of the class of measure. The tensor mode fraction then follows the number frequency distributions of inflationary mechanisms of string theory over the landscape. We show that an estimate of the relative number frequencies for small-field vs large-field inflation, while unattainable on the whole landscape, may be within reach as a regional answer for warped Calabi-Yau flux compactifications of type IIB string theory.

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