This is a Cassiopaea term for a process of transferring entities between densities or affecting teleportation. We do not have any formal understanding of what such a process would entail in terms of technology. Such a process is said to take place in most alien abduction situations.
The process is described approximately as follows: The soul is extracted from the body and used as a template for constructing a 4th density body. This body is then manipulated and the process is reversed, causing the same manipulation to be reflected on the third density body. The soul is returned to the body at some time around the original extraction. It may also be that the soul is returned at a time preceding the extraction which may present perceptual anomalies of the sort sometimes associated with UFO experiences. The flow of time in 4th density where the abductee is taken to and the 3rd density native to the abductee do not have to be related.
The idea is generally consistent with what is reported on UFO interactions and is compatible with the general absence of physical evidence and the high strangeness of these accounts.
We can speculate that the form-giving or etheric body of a being is some sort of information field which interacts with some physical phenomenon such as a specially modulated EM field. Such an interaction could be used to capture such a pattern and use it for constructing a material form in some other point of spacetime, possibly out of different materials of a different 'density.' Phenomena such a Kirlian photography or the phantom DNA effect suggest the existence of such a thing but interacting with it is speculative. Furthermore, such a pattern is not the same as soul. The Cassiopaeans have suggested that neutrinos mediate between soul and memory, thus these also would be involved. Again, this is next to untestable since neutrinos hardly interact with anything known to physics.