Scaling Invariance of Perturbations in k-Inflation Models
We study the background and perturbations in k-essence inflation models and show that a general k-essence exhibits a simple scaling property. In particular, we study two classes of k-inflation models with the potential characterized by an inflection point. We demonstrate that these models enjoy scaling properties that could be used to redefine input parameters so that the perturbations spectra satisfy the correct normalization at the CMB pivot scale. The background and perturbation equations are integrated numerically for two specific models.
Authors
- Dragoljub D. Dimitrijević (ORCID: https://orcid.org/0000-0001-6328-7027)
- Goran S. Djordjević (ORCID: https://orcid.org/0000-0002-9320-6475)
- Marko Stojanović (ORCID: https://orcid.org/0000-0003-1763-6358)
- Neven Bilić (ORCID: https://orcid.org/0000-0002-9669-6537)
- Milan Milošević (ORCID: https://orcid.org/0000-0001-6088-247X)
Institutions
- University of Nis (RS)
- Ruđer Bošković Institute (HR)
Publication Details
- Journal
- Universe
- Published
- 2025-04-09
- DOI
- https://doi.org/10.3390/universe11040128
- Citations
- 1
- Primary Topic
- Stochastic processes and financial applications
- Type
- article
- Field-Weighted Citation Impact
- 2.21
Funders
- CERN
- Abdus Salam International Centre for Theoretical Physics