Einstein's 1918-1920 Ideas on the Role of Ether in Relativity, and the Morton Ether Theory
In 1918 and 1920 Einstein declared that ether could certainly play a role in General Relativity Theory (GRT) and would not need to be excluded from Special Relativity Theory (SRT). He thus left the door open for the insertion of ether concepts in both the gravitational case of dense matter and strong gravitational fields and the case of comparatively field-free spaces of interstellar and intergalactic space. Einstein correctly maintained that the ether is non-rotational and has no ordinary fixed points and has no ordinary state of motion. This paper describes the essence of the ether and explains why the ether is logically necessary.
The Morton Ether Theory of 1965 uses the phenomenon of pair production of electrons and positron pairs to indicate that the production of charged particles in strong electric gradients (near heavy nuclei) suggests that a homogeneous mixture of positive and negative electric charge exists in the neighborhood of the heavy nuclei and indeed fills all the space of the known universe.