Mirage Cosmology on Unstable D3-Brane Universe
Anastasios Psinas
TL;DR
This paper investigates how an unstable D3-brane's motion in higher dimensions, coupled with a tachyon and gauge field, leads to a smoother early universe singularity compared to previous models.
Contribution
It introduces a model where tachyon and gauge field interactions produce a novel, smoother cosmological evolution on an unstable brane.
Findings
Smoother initial cosmological singularity observed
Tachyon-gauge coupling influences universe evolution
Higher-dimensional brane dynamics affect early universe behavior
Abstract
We study the geodesic motion of an unstable brane moving in a higher dimensional bulk spacetime. The tachyon which is coupled to a U(1) gauge field induces a non-trivial cosmological evolution. Interestingly enough, this system exhibits a much smoother initial cosmological singularity in comparison with former works.
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