Abstract
In this paper, we show that single-field chaotic inflation on the brane with the potential $V=a \phi^p$ is compatible with the Swampland criteria. The spectral index and the running spectral index are within experimental bounds for $0<p \leq 2$. The tensor to scalar ratio is within observational bounds if $p \lesssim \mathcal{O}(1)$.
Highlights
If we have a UV completed theory, it should be able to give some insight to our low-energy effective theory
We show that single-field chaotic inflation on the brane with the potential V 1⁄4 aφp is compatible with the swampland criteria
We can see that when we reduce p ≲ Oð1Þ, the tensor to scalar ratio r starts to enter a range within the experimental constraints with an acceptable value of the spectral index ns
Summary
If we have a UV completed theory, it should be able to give some insight to our low-energy effective theory. One possibility to evade those criteria in single-field inflation is to consider a curvatonlike mechanism [8] Another possible way is given in [9], where it is pointed out that quintessential brane inflation is compatible with swampland criteria; the unacceptably high tensor to scalar ratio is predicted unless the initial state has a nonBunch-Davies component. It is shown in [10]. We consider chaotic inflation on the brane and show that it can satisfy both the swampland criteria and the tensor to scalar ratio constraints
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