Sharif Digital Repository

Exponential expansion of the universe is an important issue in early-time and late-time cosmology . In the widely accepted standard model of cosmology, there are two assumed exponentially expanding phases , early-time inflationary phase and late-time dark energy phase . On the other hand, there are ideas from string theory that limit the possibility of constructing the de Sitter space, which are categorized in the Swampland program . In this work, we first examine no-scale models of de Sitter space in supergravity from the point of view of de Sitter conjectures . In this regard, we observe that satisfying these conjectures limits the parameter and field space and the trans-Planckian...