Trans-Planckian issues for inflationary cosmology

By Robert Brandenberger, Jérôme Martin. 2012

177 citations recorded by the source corpus.

The accelerated expansion of space during the cosmological inflation period leads to trans-Planckian issues which need to be addressed. Most importantly, the physical wavelength of fluctuations which are studied at the present time by means of cosmological observations may well originate with a wavelength smaller than the Planck length at the beginning of the inflationary phase. Thus, questions arise as to whether the usual predictions of inflationary cosmology are robust considering our ignorance of physics on trans-Planckian scales, and whether the imprints of Planck-scale physics are at the present time observable. These and other related questions are reviewed in this paper.

Subfields: Astronomy and Astrophysics, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/6f271677020eb1cf73077454caa894add9a1e299

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. P. Peter
2. Robert Brandenberger
3. Alek Bedroya
4. Yi Wang
5. C. Vafa
6. Yi-Fu Cai
7. Xingang Chen
8. Hirosi Ooguri

In Statistical and Nonlinear Physics

1. P. Peter
2. Robert Brandenberger
3. Yi Wang
4. C. Vafa
5. Alek Bedroya
6. Marcos Mariño
7. Mina Aganagic
8. R. Dijkgraaf

Citations in the corpus

• Inflation, Cosmic Perturbations and Non-Gaussianities (2013, background): “[59] R.”
• Bouncing Cosmologies: Progress and Problems (2016, background): “For a recent review of this problem, the reader is refered to [12].”
• Trans-Planckian Censorship and the Swampland (2019, background): “However, it has been pointed out that this framework could fall apart if the mentioned macroscopic fluctuations trace back to trans-Planckian wavelengths during inflation [12–14] (see also [15, 16]).”