Superconductivity is as near as we can come to cancelling the effect of gravitation, so this is more like anti-magnetism.
A vacuum is still subject to gravitational waves, and we have had no way to test without gravitational waves to date.
A vacuum is still subject to gravitational waves, and we have had no way to test without gravitational waves to date.
Step 1: Reverse the Polarity
Step 2: Done