D-branes in Cosmological Backgrounds

Details D-branes in Cosmological Backgrounds D-branes in Cosmological Backgrounds

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..805..366h&link_type=abstract

PARTICLES, STRINGS, AND COSMOLOGY: 11th International Symposium on Particles, Strings, and Cosmology; PASCOS 2005. AIP Conferen

Mathematics

Logic

D Branes, Particle-Theory And Field-Theory Models Of The Early Universe

Scientific paper

We investigate D-branes in cosmological models. In particuler, we examine Misner space, which can be constructed as a Lorentzian orbifold. This space includes big crunch/big bang singularity and closed time-like curves. We compute annulas amplitudes for open strings on D0-brane and D1-brane and find imaginary part of the amplitudes. The imaginary parts are interpreted as the rate of open string pair creation on D0-brane and as the emission rate of closed strings from D1-brane. We also compute 2-->2 scattering amplitude of open strings and examine its divergence structure.

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