A refined trans-Planckian censorship conjecture

TL;DR

This paper introduces a refined trans-Planckian censorship conjecture (TCC) derived from the scalar weak gravity conjecture and entropy bounds, which avoids fine-tuning and aligns with string theory and eternal inflation scenarios.

Contribution

It presents a new version of TCC that is more compatible with string theory and eternal inflation, eliminating the need for fine-tuning in inflation models.

Findings

Refined TCC derived from scalar weak gravity conjecture and entropy bounds

Automatically passes tests from stringy examples supporting original TCC

Compatible with hilltop eternal inflation

Abstract

We propose a refined version of trans-Planckian censorship conjecture (TCC), which could be elaborated from the strong scalar weak gravity conjecture combined with some entropy bounds. In particular, no fine-tuning on the inflation model-building is required in the refined TCC, and it automatically passes the tests from those stringy examples that support the original TCC. Furthermore, our refined TCC could be consistent with hilltop eternal inflation.