We analyze the Bianchi I cosmology in presence of a massless scalar field and describe its dynamics via semiclassical quantum polymer approach. study morphology Big Bounce by adopting three different sets configurational variables: Ashtekar connections, set anisotropic volume-like coordinates Universe volume plus two anisotropy (the latter variables would coincide case an isotropic Universe). I...

We consider a simple cosmological model consisting of an empty Bianchi I Universe, whose Hamiltonian we deparametrise to provide natural clock variable. The thus effectively describes isotropic universe with induced given by the shear. By quantising this model, obtain various different possible bouncing trajectories (semiquantum expectation values on coherent states or obtained de Broglie–Bohm ...

In this work, we investigate the anisotropic Bianchi type I cosmological model in chiral set-up a twofold manner. Firstly, consider quintessence plus [Formula: see text]-essence-like model, where two scalar fields but only one potential term is considered. Secondly, look at addition to terms are taken into account as well standard kinetic energy and mixed term. Regarding second it shown that po...

We use a dynamical systems approach to investigate Bianchi type I and II universes in quadratic theories of gravity. Due to the complicated nature of the equations of motion we focus on the stability of exact solutions and find that there exists an isotropic FRW universe acting as a past attractor. This may indicate that there is an isotropisation mechanism at early times for these kind of theo...

Within the framework of general theory relativity, a cosmological model type V according to Bianchi classification is constructed, where non-interacting ideal fluid used as source gravity. Two possible solutions have been found, first which describes stage early inflation evolution Universe.

In the framework of Einstein-Maxwell-axion-aether theory we establish model, Lagrangian which contains sin-type generalization term describing axion-photon coupling, and axionically induced cosine-type modification attributed to dilaton-photon interactions. The extension axion-dilaton-aether electrodynamics is inspired by Jackson's idea concerning internal symmetry equations electromagnetism. a...

In the current study, we studied a f Q -gravitational, anisotropic, locally rotationally symmetric (LRS), Bianchi type-I spacetime universe. We have adopted freely chosen function id="M3"> = + α , wh...