This new jet engine uses plasma. Plasma is the fourth state of matter, after solid liquid, and gas. It already exists on the surface of the sun and in lightning, but humans can also create it.

Plasma arc cutting (PAC) is a thermal cutting technique widely used in manufacturing applications such as shipbuilding, ...

demonstrating thrust comparable to conventional jet engines. Tang’s approach differs from other plasma propulsion systems, such as those used by NASA. For example, NASA’s xenon-based plasma ...

Russia's state-owned Rosatom announced a prototype plasma engine which could speed up travel to other planets.

When [Jay Bowles] demoed his first-generation ion thruster on Plasma Channel ... more like a miniature jet engine than anything that had come before it. Optimizations would need to be made ...