An advance form of technology, using Hologram Projections and Quantum Fields. It is highly advance technology not accessible by any but the most cosmically enlightened of civilizations.
A quantum hologram is a Quantum Field projected as a Hologram. As such, while the construct may just be a projected image, as far as physics are concerned, it is a real, physical object, even capable of bleeding. They can be remotely operated or inhabited by energy life forms, or mental projections.