Cosmological Perturbations in the Teleparallel analog of Horndeski gravity

Understand

In this work we study the cosmological perturbations in Bahamonde-Dialektopoulos-Levi Said (BDLS) theory, i.e.

• the teleparallel analog of Horndeski gravity.
• In order to understand the evolution of structure in a cosmological model, it is necessary to study its cosmology not only in the background but also perturbatively.
• Both Horndeski and its teleparallel analog have been analyzed a lot in the literature, but in order to study them quantitatively, we need to know their cosmological perturbations.