Four-dimensional Brane–Chern–Simons Gravity and Cosmology

Abstract From the field equations corresponding to a four-dimensional brane embedded in five-dimensional spacetime of Einstein–Chern–Simons theory for gravity, we find cosmological solutions that describe an accelerated expansion flat universe. Apart from quintessence-type evolution scheme, obtain transient phantom evolution, which is not ruled out by current observational data. Additionally, bouncing solution shown. The introduction kinetic term action shows de Sitter behavior although energy density constant. A quintessence also found. We conjecture on possible geometric origin dark coming this action.