ABSTRACT
This chapter discusses the relativistic physics on which the models are based, their holographic description, some implications from the classical energy conditions, and an interpretation of dark energy in terms of the entangled energy of the universe. It focuses on the quantum cosmic models that result from the existence of a nonzero entropy of entanglement. The chapter deals with some new four-dimensional cosmological models describing an accelerating universe in the spatially flat case. It considers new fundamental aspects that strengthen the consistency and provides further physical motivation to the general model. The chapter also considers the static Schwarzschild-quantum mechanically perturbed solutions. Besides general relativity, quantum theory is the other building block which can never be ignored while constructing a predicting model for any physical system. The dynamical structure of the expression is once again able to circumvent the difficulties stemming from dealing with a Bohmian description of a gravitational field.
