Trans-Planckian censorship of multistage inflation and dark energy

Abstract

We explore the bound of the trans-Planckian censorship conjecture on an inflation model with multiple stages. We show that if the first inflationary stage is responsible for the primordial perturbations in the cosmic microwave background window, the $e$-folding number of each subsequent stage will be bounded by the energy scale of the first stage. This seems to imply that the lifetime of the current era of accelerated expansion (regarded as one of the multiple inflationary stages) might be a probe for distinguishing inflation from its alternatives. We also present a multistage inflation model in a landscape consisting of anti-de Sitter vacua separated by potential barriers.

13 pages, 4 figures; references added; updated to match published version

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Cited by in corpus (19)

• The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe
• Relaxing cosmological tensions with a sign switching cosmological constant
• Entanglement Entropy of Cosmological Perturbations
• $T_0$ censorship of early dark energy and AdS vacua
• Testing AdS early dark energy with Planck, SPTpol and LSS data
• Intermittent null energy condition violations during inflation and primordial gravitational waves
• Is the NANOGrav signal a hint of dS decay during inflation?
• Generating enhanced primordial GWs during inflation with intermittent violation of NEC and diminishment of GW propagating speed
• Swampland, Trans-Planckian Censorship and Fine-Tuning Problem for Inflation: Tunnelling Wavefunction to the Rescue
• Role of trans-Planckian modes in cosmology
• Creating Spatial Flatness by Combining String Gas Cosmology and Power Law Inflation
• Thermal, Trapped and Chromo-Natural Inflation in light of the Swampland Criteria and the Trans-Planckian Censorship Conjecture
• Unitarity Problems for an Effective Field Theory Description of Early Universe Cosmology
• Limitations of an Effective Field Theory Treatment of Early Universe Cosmology
• Populating the landscape in an inhomogeneous universe
• Large $r$ against Trans-Planckian Censorship in Scalar-Tensor Theory?
• Escape from the swamp with spectator
• Trans-Planckian Censorship Conjecture and Early Universe Cosmology
• Implications of single field inflation in general cosmological scenarios on the nature of dark energy given the swampland conjectures