Primordial enhanced scalar perturbations can source a significant amount of gravitational waves (GWs). Existing studies compute the SGWB produced in the RD-era by the primordial enhanced scalar perturbations with the Green formalism. In this work we review this result by using both Green function method and the in-in formalism, and eventually we go over by evaluating the subdominant contribution from primordial enhanced-scalar & tensor perturbations.

Gravitational waves sourced by primordial scalar perturbations

Grutta, Pietro
2020/2021

Abstract

Primordial enhanced scalar perturbations can source a significant amount of gravitational waves (GWs). Existing studies compute the SGWB produced in the RD-era by the primordial enhanced scalar perturbations with the Green formalism. In this work we review this result by using both Green function method and the in-in formalism, and eventually we go over by evaluating the subdominant contribution from primordial enhanced-scalar & tensor perturbations.
2020-07
137
SGWB, cosmological perturbations, inflation, LISA, PBH, dark matter
File in questo prodotto:
File Dimensione Formato  
Tesi_magistrale_Pietro_Grutta.pdf

accesso aperto

Dimensione 3.02 MB
Formato Adobe PDF
3.02 MB Adobe PDF Visualizza/Apri

The text of this website © Università degli studi di Padova. Full Text are published under a non-exclusive license. Metadata are under a CC0 License

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12608/22816