Electro- and Magnetostatics of a Cosmic Pseudoscalar Field Coupled to Electromagnetism

Laboratory search for a quintessence field

“…Even though scalar field models are Lorentz covariant, the existence of a cosmic scalar φ introduces a special frame in which φ is homogeneous. Therefore, any interaction of ordinary matter with the scalar field can lead to an apparent violation of local Lorentz invariance [4][5][6][7][8]. If the scalar field is slowly evolving in time, it defines a preferred cosmic rest frame.…”