The Aspen project was started in 2016 and is based on a hypothesis formed the year prior. This hypothesis relates to the quantum state of the vacuum, the flow of time, and dark energy. Dark energy is an antigravitational effect that exists when the vacuum pressure of space becomes negative. In theory, time (the 4th dimension) is responsible for all of the forces and is what we observe to be gravity/dark energy which are two aspects of the same effect. Every point in our 3 dimensional space is expanding due to the nature of the 4th dimension and the effects associated with our 3 dimensions moving through it. Similar to a fluid being poured onto a flat surface (a 3rd dimension affecting a 2 dimensional plane) there is a fluid flowing into our 3 dimensional reality from a 4th dimension. This invisible superfluid emerges from every point in space and flows outwards while carrying mass with it. Quantum fields are electromagnetic in nature and thus can be manipulated by external electromagnetic fields.
Negative pressures can be created by increasing the electromagnetic stress gradients at a particular point in space. Our Aspen (Antigravitational Space Propulsion Engine) is capable of doing just that.