Trans-Planckian Censorship and the Swampland

@article{Bedroya2019TransPlanckianCA,
  title={Trans-Planckian Censorship and the Swampland},
  author={Alek Bedroya and Cumrun Vafa},
  journal={arXiv: High Energy Physics - Theory},
  year={2019}
}
In this paper, we propose a new Swampland condition, the Trans-Planckian Censorship Conjecture (TCC), based on the idea that in a consistent quantum theory of gravity sub-Planckian quantum fluctuations should remain quantum and never become larger than the Hubble horizon and freeze in an expanding universe. Applied to the case of scalar fields, it leads to conditions that are similar to the refined dS Swampland conjecture. For large field ranges, TCC is stronger than the dS Swampland conjecture… 

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