Cosmic Bounce Solutions in f (ℚ, ℂ) Gravity: A New Perspective on Cosmic Evolution

This research examines the feasibility of cosmic bounce solutions to explore cosmic evolution in the newly developed f(ℚ, ℂ) theory, where non-metricity is denoted by ℚ and the boundary term is represented by ℂ. For this purpose, we examine the dynamics of a flat homogeneous and isotropic universe model in the presence of isotropic matter distribution. A particular form of this modified gravity is considered to examine how this gravitational framework influences cosmic evolution. By deriving and analyzing the modified field equations, we examine several bounce models, i.e., exponential, matter, oscillatory, symmetric, and super bounce models. The study also examines the characteristics of dark energy by assessing the dynamics of pressure and energy density. An extensive analysis of the universe evolutionary phases is performed by assessing the equation of state and deceleration parameters. Our findings indicate that this modified gravitational theory presents an alternative framework to standard cosmology, elucidating gravitational interactions and the primordial cosmic development.