Trans-Planckian censorship and inflationary cosmology

By Alek Bedroya, Robert Brandenberger, M. Loverde, C. Vafa. Physical Review D, 2019

195 citations recorded by the source corpus.

We study the implications of the recently proposed Trans-Planckian Censorship Conjecture (TCC) for early universe cosmology and in particular inflationary cosmology. The TCC leads to the conclusion that if we want inflationary cosmology to provide a successful scenario for cosmological structure formation, the energy scale of inflation has to be lower than $10^9$ GeV. Demanding the correct amplitude of the cosmological perturbations then forces the generalized slow-roll parameter $\epsilon$ of the model to be very small ($<10^{-31}$). This leads to the prediction of a negligible amplitude of primordial gravitational waves. For slow-roll inflation models, it also leads to severe fine tuning of initial conditions.

Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/c688d6375a1a6defc9543a6ed86182dffaee12fb

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. Alek Bedroya
2. C. Vafa
3. Hirosi Ooguri
4. B. Pioline
5. N. Seiberg
6. R. Dijkgraaf
7. Marcos Mariño
8. Eran Palti

In Atomic and Molecular Physics, and Optics

1. C. Vafa
2. Alek Bedroya

In Nuclear and High Energy Physics

1. Alek Bedroya
2. C. Vafa
3. Marcos Mariño
4. Mina Aganagic
5. R. Dijkgraaf
6. A. Klemm
7. N. Seiberg
8. E. Witten

Citations in the corpus

• Trans-Planckian Censorship and the Swampland (2019, methodology): “We have greatly benefited from discussions with Robert Brandenberger and Marilena Loverde and their explanations of trans-Planckians issues in inflation as well as for an ongoing joint project on TCC [30].”