Without assuming a spherical cow, that is well into the realm of science fiction-stuff we have no idea how to do. It assumes a degree of control over the variables that is far beyond anything we have access to.

As a parallel, on a purely theoretical level, we know how to construct a warp drive as well[1].

Solving a theoretical equation is one thing, replicating the prerequisite conditions experimentally is another entirely. Theoretically you can balance a perfect sphere upon another perfect sphere. In practice, you can't because setting up such an arrangement is practically impossible.

[1] https://en.wikipedia.org/wiki/Alcubierre_drive