On gravitational waves generated during inflation

10th Workshop of the Gravitation and Mathematical Physics Division, Mexican Physical Society

物理学;数学

Moreno, Claudia^1 ; Aguilar, José Edgar Madriz^1

Departamento de Matemáticas, Centro Universitario de Ciencias Exactas e Ingenierías (CUCEI), Universidad de Guadalajara (UdG), Av. Revolución 1500 S.R., Guadalajara, Jalisco

44430, Mexico^1

关键词: Exponential factors;    Power-law;    Scale invariant;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/545/1/012010/pdf
DOI  :  10.1088/1742-6596/545/1/012010

来源: IOP

【 摘 要 】

We study cosmological gravitational waves generated during inflation under the influence of a decaying cosmological «constant». A non-perturbative contribution of the dynamical cosmological «constant» to the tensor modes is considered. As applications of the model we study the well-known cases Λ(t) σH2and Λ(t) θH. The spectrum of gravitational waves results scale invariant only for the first case, leaving this to new proposals of the form: Λ(t) f(H,H2), in order to include inflation in some Λ(t)CDM models. We also found that the non-perturbative contributions of Λ(t), accelerate the decreasing of the amplitude of gravitational waves during a power-law inflationary stage, by an exponential factor.