Classifies singularity structures and asymptotics of cosmological solutions driven by exponential string potentials and curvatures k, k' in maximally symmetric spaces, emphasizing flat slices.
Consistent gravitino couplings in non-supersymmetric strings
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abstract
The massless spectrum of the ten dimensional USp(32) type I string has an N=1 supergravity multiplet coupled to non-supersymmetric matter. This raises the question of the consistency of the gravitino interactions. We resolve this apparent puzzle by arguing for the existence of a local supersymmetry which is non-linearly realised in the open sector. We determine the leading order low energy effective Lagrangian. Similar results are expected to apply to lower dimensional type I models where supergravity is coupled to non-supersymmetric branes.
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A survey of tachyons and tadpoles in non-supersymmetric closed and orientifold strings, including ten-dimensional models and landscape attempts.
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On Cosmologies and Vacua Driven by Tension and Curvatures
Classifies singularity structures and asymptotics of cosmological solutions driven by exponential string potentials and curvatures k, k' in maximally symmetric spaces, emphasizing flat slices.
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Aspects of strings without spacetime supersymmetry
A survey of tachyons and tadpoles in non-supersymmetric closed and orientifold strings, including ten-dimensional models and landscape attempts.