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O(d,d) covariant string cosmology to all orders in α′
A5: 1041 (Cops seminar room) ()
A5: 1041 (Cops seminar room)
Abstract: Recently, all duality invariant α′ (alpha-prime)-corrections to the
massless NS-NS sector of string theory on time-dependent backgrounds were
classified and the form of their contribution to the action were calculated.
In this talk we will see how to introduce matter sources in the resulting
equations of motion in an O(d,d) covariant way. Then we show that either
starting with the corrected equations and sourcing them with matter or
considering corrections to the matter sourced lowest order equations give the
same set of equations that defines string cosmology to all orders in α′. We
also discuss perturbative and non-perturbative de Sitter solutions including
matter, and explicitly show that de Sitter solutions are allowed