TY - JOUR
T1 - Impact of generalized dissipative coefficient on warm inflationary dynamics in the light of latest Planck data
AU - Jawad, Abdul
AU - Hussain, Shahzad
AU - Rani, Shamaila
AU - Videla, Nelson
N1 - Funding Information:
Acknowledgements A. Jawad is thankful to the Higher Education Commission, Islamabad, Pakistan for its financial support under the grant No: 5412/Federal/NRPU/R&D/HEC/2016 of NATIONAL RESEARCH PROGRAMME FOR UNIVERSITIES (NRPU). N.V. was supported by Comisión Nacional de Ciencias y Tecnología of Chile through FONDECYT Grant no. 3150490. Finally, the authors wish to thank the anonymous referee for her/his valuable comments, which have helped us to improve the presentation in our manuscript.
Publisher Copyright:
© 2017, The Author(s).
PY - 2017/10/1
Y1 - 2017/10/1
N2 - The warm inflation scenario in view of the modified Chaplygin gas is studied. We consider the inflationary expansion to be driven by a standard scalar field whose decay ratio Γ has a generic power-law dependence with the scalar field ϕ and the temperature of the thermal bath T. By assuming an exponential power-law dependence in the cosmic time for the scale factor a(t), corresponding to the intermediate inflation model, we solve the background and perturbative dynamics considering our model to evolve according to (1) weak dissipative regime and (2) strong dissipative regime. Specifically, we find explicit expressions for the dissipative coefficient, scalar potential, and the relevant inflationary observables like the scalar power spectrum, scalar spectral index, and tensor-to-scalar ratio. The free parameters characterizing our model are constrained by considering the essential condition for warm inflation, the conditions for the model evolves according to weak or strong dissipative regime, and the 2015 Planck results through the ns–r plane.
AB - The warm inflation scenario in view of the modified Chaplygin gas is studied. We consider the inflationary expansion to be driven by a standard scalar field whose decay ratio Γ has a generic power-law dependence with the scalar field ϕ and the temperature of the thermal bath T. By assuming an exponential power-law dependence in the cosmic time for the scale factor a(t), corresponding to the intermediate inflation model, we solve the background and perturbative dynamics considering our model to evolve according to (1) weak dissipative regime and (2) strong dissipative regime. Specifically, we find explicit expressions for the dissipative coefficient, scalar potential, and the relevant inflationary observables like the scalar power spectrum, scalar spectral index, and tensor-to-scalar ratio. The free parameters characterizing our model are constrained by considering the essential condition for warm inflation, the conditions for the model evolves according to weak or strong dissipative regime, and the 2015 Planck results through the ns–r plane.
UR - http://www.scopus.com/inward/record.url?scp=85032358229&partnerID=8YFLogxK
U2 - 10.1140/epjc/s10052-017-5264-0
DO - 10.1140/epjc/s10052-017-5264-0
M3 - Article
AN - SCOPUS:85032358229
VL - 77
JO - European Physical Journal C
JF - European Physical Journal C
SN - 1434-6044
IS - 10
M1 - 700
ER -