Running and Running of the Running of the Scalar Spectral Index in Warm Inflation
The next generation of cosmological observations are expected to improve the measurements of several quantities connected to the primordial inflation in the early Universe. These quantities include, for example, improved measurements for the spectral index of the scalar curvature of the primordial p...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Universe |
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| Online Access: | https://www.mdpi.com/2218-1997/9/2/76 |
| _version_ | 1797617902041432064 |
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| author | Suratna Das Rudnei O. Ramos |
| author_facet | Suratna Das Rudnei O. Ramos |
| author_sort | Suratna Das |
| collection | DOAJ |
| description | The next generation of cosmological observations are expected to improve the measurements of several quantities connected to the primordial inflation in the early Universe. These quantities include, for example, improved measurements for the spectral index of the scalar curvature of the primordial power spectrum and to also bring a better understanding on the scaling dependence of the primordial spectrum. This includes the running of the tilt and possibly, also, the running of the running. In this paper, we investigate the possibility of generating large runnings in the context of warm inflation. Useful analytical expressions for the runnings are derived in the context of warm inflation in the large dissipation regime. The results are compared to and discussed for some well-motivated primordial inflaton potentials that have recently been of interest in the literature. |
| first_indexed | 2024-03-11T08:02:35Z |
| format | Article |
| id | doaj.art-2febfc551bac411a9179e2161bd50ace |
| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-03-11T08:02:35Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj.art-2febfc551bac411a9179e2161bd50ace2023-11-16T23:40:36ZengMDPI AGUniverse2218-19972023-01-01927610.3390/universe9020076Running and Running of the Running of the Scalar Spectral Index in Warm InflationSuratna Das0Rudnei O. Ramos1Department of Physics, Ashoka University, Rajiv Gandhi Education City, Rai, Sonipat 131029, Haryana, IndiaDepartamento de Fisica Teorica, Universidade do Estado do Rio de Janeiro, Rio de Janeiro 20550-013, RJ, BrazilThe next generation of cosmological observations are expected to improve the measurements of several quantities connected to the primordial inflation in the early Universe. These quantities include, for example, improved measurements for the spectral index of the scalar curvature of the primordial power spectrum and to also bring a better understanding on the scaling dependence of the primordial spectrum. This includes the running of the tilt and possibly, also, the running of the running. In this paper, we investigate the possibility of generating large runnings in the context of warm inflation. Useful analytical expressions for the runnings are derived in the context of warm inflation in the large dissipation regime. The results are compared to and discussed for some well-motivated primordial inflaton potentials that have recently been of interest in the literature.https://www.mdpi.com/2218-1997/9/2/76inflationwarm inflationcosmic microwave background |
| spellingShingle | Suratna Das Rudnei O. Ramos Running and Running of the Running of the Scalar Spectral Index in Warm Inflation Universe inflation warm inflation cosmic microwave background |
| title | Running and Running of the Running of the Scalar Spectral Index in Warm Inflation |
| title_full | Running and Running of the Running of the Scalar Spectral Index in Warm Inflation |
| title_fullStr | Running and Running of the Running of the Scalar Spectral Index in Warm Inflation |
| title_full_unstemmed | Running and Running of the Running of the Scalar Spectral Index in Warm Inflation |
| title_short | Running and Running of the Running of the Scalar Spectral Index in Warm Inflation |
| title_sort | running and running of the running of the scalar spectral index in warm inflation |
| topic | inflation warm inflation cosmic microwave background |
| url | https://www.mdpi.com/2218-1997/9/2/76 |
| work_keys_str_mv | AT suratnadas runningandrunningoftherunningofthescalarspectralindexinwarminflation AT rudneioramos runningandrunningoftherunningofthescalarspectralindexinwarminflation |