A cosmology sourced by instant folded strings produces slow-roll dark energy from the dilaton potential's slope, with NEC violation suppressed in expansion and amplified in contraction.
The Overshoot Problem and Giant Structures
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Models of small-field inflation often suffer from the overshoot problem. A particularly efficient resolution to the problem was proposed recently in the context of string theory. We show that this resolution predicts the existence of giant spherically symmetric overdense regions with radius of at least 110 Mpc. We argue that if such structures will be found they could offer an experimental window into string theory.
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Instant Cosmology
A cosmology sourced by instant folded strings produces slow-roll dark energy from the dilaton potential's slope, with NEC violation suppressed in expansion and amplified in contraction.