Disjunction
By disjunction is meant the separation of the source of a field from matter to which interaction would be with under normal physical states. According to a summary of speculative propulsion ideas on NASA's website
| “ | This concept entertains the possibility that the source of a field and that which reacts to a field can be separated. By displacing them in space, the reactant is shifted to a point where the field has a slope, thus producing reaction forces between the source and the reactant. Although existing evidence strongly suggests that the source, reactant, and inertial mass properties are inseparable, any future evidence to the contrary would have revolutionary implication to this propulsion application. | ” |
The concept is expressed in math as :
Read more about this topic: Breakthrough Propulsion Physics Program