Axionic extension of the Einstein-aether theory: How does dynamic aether regulate the state of axionic dark matter?

摘要: Abstract In the framework of axionic extension Einstein-aether theory we establish model, which describes a stiff regulation behavior dark matter by dynamic aether. The aether realizes this procedure via modified Higgs potential, designed for modeling nonlinear self-interaction pseudoscalar (axion) field; modification potential is that its minima are not fixed, and their positions depths depend now on square covariant derivative velocity four-vector. Exact solutions to master equations, correspondingly, obtained in homogeneous isotropic cosmological model. effective equation state type. Homogeneous perturbations field, Hubble function scale factor shown fade out with time, there no growing modes, model stable.