T-Duality and the Spectrum of Gravitational Waves

Details T-Duality and the Spectrum of Gravitational Waves T-Duality and the Spectrum of Gravitational Waves

2005-08-17

arxiv.org/abs/hep-th/0508119v1

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, 1 figure

Scientific paper

In the inflationary universe scenario, the physical wavelength of cosmological fluctuation modes which are currently probed in observations was shorter than the Hubble radius, and in fact shorter than the Planck and string lengths, at the beginning of the period of inflation. Thus, during the early stages of evolution, the fluctuations are subject to Planck scale physics. In the context of an inflationary cosmological background, we examine the signatures of a specific modified dispersion relation motivated by the T-duality symmetry of string theory on the power spectrum of gravitational waves. The modified dispersion relation is extracted from the asymptotic limit of the string center of mass propagator.

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