Swampland, trans-Planckian censorship and fine-tuning problem for inflation: tunnelling wavefunction to the rescue

The trans-Planckian censorship conjecture implies that single-field models of inflation require an extreme fine-tuning of the initial conditions due to the very low-scale of inflation. In this work, we show how a quantum cosmological proposal—namely the tunneling wavefunction—naturally provides the...

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Bibliographic Details
Published in:Journal of cosmology and astroparticle physics 2020-10, Vol.2020 (10), p.37-37
Main Authors: Brahma, Suddhasattwa, Brandenberger, Robert, Yeom, Dong-han
Format: Article
Language:English
Subjects:
Censorship
Initial conditions
Tunneling
Wave functions
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Summary:The trans-Planckian censorship conjecture implies that single-field models of inflation require an extreme fine-tuning of the initial conditions due to the very low-scale of inflation. In this work, we show how a quantum cosmological proposal—namely the tunneling wavefunction—naturally provides the necessary initial conditions without requiring such fine-tunings. More generally, we show how the tunneling wavefunction can provide suitable initial conditions for hilltop inflation models, the latter being typically preferred by the swampland constraints.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2020/10/037