The B-field model and its quantum theory
The B-field model is based on a non-vanishing three-dimensional B-field component. Its quasi-classical formulation is in excellent agreement with the quantum theory of the universe. The theory is shown to be free of the superrotation, and it is shown that the B-field model is a standard model of higher-derivative gravity. The B-field model is well-defined in the vicinity of the Planck scale, but it is found to take a large amount of energy to explain the observed trajectory of the universe. It is shown that the B-field model is a plausible candidate for a compactified-space gauge theory. We discuss the quantum theory of the B-field model and its quantum theory.