# Warm inflation in f(G) theory of gravity

## Abstract

The aim of this paper is to explore warm inflation in the background of f(G) theory of gravity using scalar fields for the FRW universe model. We construct the field equations under slow-roll approximations and evaluate the slow-roll parameters, scalar and tensor power spectra and their corresponding spectral indices using viable power-law model. These parameters are evaluated for a constant as well as variable dissipation factor during intermediate and logamediate inflationary epochs. We also find the number of e-folds and tensor- scalar ratio for each case. The graphical behavior of these parameters proves that the isotropic model in f(G) gravity is compatible with observational Planck data.

- Authors:

- University of the Punjab, Quaid-e-Azam Campus, Department of Mathematics (Pakistan)

- Publication Date:

- OSTI Identifier:
- 22617231

- Resource Type:
- Journal Article

- Resource Relation:
- Journal Name: Journal of Experimental and Theoretical Physics; Journal Volume: 123; Journal Issue: 1; Other Information: Copyright (c) 2016 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA)

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; APPROXIMATIONS; COSMOLOGICAL INFLATION; COSMOLOGICAL MODELS; DISSIPATION FACTOR; FIELD EQUATIONS; GENERAL RELATIVITY THEORY; GRAVITATION; INDEXES; RICCI TENSOR; SCALAR FIELDS; SCALARS; SPECTRA; TENSORS; UNIVERSE

### Citation Formats

```
Sharif, M., E-mail: msharif.math@pu.edu.pk, and Ikram, A., E-mail: ayeshamaths91@gmail.com.
```*Warm inflation in f(G) theory of gravity*. United States: N. p., 2016.
Web. doi:10.1134/S1063776116070232.

```
Sharif, M., E-mail: msharif.math@pu.edu.pk, & Ikram, A., E-mail: ayeshamaths91@gmail.com.
```*Warm inflation in f(G) theory of gravity*. United States. doi:10.1134/S1063776116070232.

```
Sharif, M., E-mail: msharif.math@pu.edu.pk, and Ikram, A., E-mail: ayeshamaths91@gmail.com. Fri .
"Warm inflation in f(G) theory of gravity". United States.
doi:10.1134/S1063776116070232.
```

```
@article{osti_22617231,
```

title = {Warm inflation in f(G) theory of gravity},

author = {Sharif, M., E-mail: msharif.math@pu.edu.pk and Ikram, A., E-mail: ayeshamaths91@gmail.com},

abstractNote = {The aim of this paper is to explore warm inflation in the background of f(G) theory of gravity using scalar fields for the FRW universe model. We construct the field equations under slow-roll approximations and evaluate the slow-roll parameters, scalar and tensor power spectra and their corresponding spectral indices using viable power-law model. These parameters are evaluated for a constant as well as variable dissipation factor during intermediate and logamediate inflationary epochs. We also find the number of e-folds and tensor- scalar ratio for each case. The graphical behavior of these parameters proves that the isotropic model in f(G) gravity is compatible with observational Planck data.},

doi = {10.1134/S1063776116070232},

journal = {Journal of Experimental and Theoretical Physics},

number = 1,

volume = 123,

place = {United States},

year = {Fri Jul 15 00:00:00 EDT 2016},

month = {Fri Jul 15 00:00:00 EDT 2016}

}

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