Granted, not much is known about Dark Energy. Indeed, it may not even exist.
What we know is that something is driving the expansion of space (understanding we do not live in a Hubble bubble). This expansion is either:
- A property intrinsic to space; or
- Energy liberated from the collision, and subsequent annihilation of virtual particles.
Beyond this, we do not know much else. For the sake of simplifying scientific adherence, I have averaged these two explanations. For the sake of this questions we know that when space expands, dark energy is responsible.
Assume that technology exists which is capable of contracting space (a feat that is understood to be obtainable employing highly-dense matter rotating at incredible speeds).
If we can put strain on space symmetrically, creating a negative gradient of space, will space about which this gradient is centered expand? If so, is this expansion the result of dark energy or the generation of dark energy?
EDIT: Imagine you had a torus made of some degenerate matter, be it strange matter, neutronium, or even a black hole. All of this stuff is really, really dense. We know that things that are dense, or otherwise heavy generate appreciable gravitational fields via bending of space-time.
If anything with a positive mass travels at a velocity approaching the speed of light (technically any non-zero velocity), the object begins to experience time-dilation when space-time resists this velocity.
As such, the idea is, if we take something really dense and spin it around a torus at speeds approaching the speed of light, we should be able to generate some pretty significant gravitational waves. If you cleverly arrange several tori into a sphere, you could create a region of space in the center of the sphere that is forced to expand (as space is pulled onto the surface of the sphere). Sort-of like a fictional Dyson Planet, where gravity is only on the surface of the planet.
NOTE: This is my first post, I am writing a novella and doing some world-building first. I can migrate to physics if this board isn't appropriate. Thanks!