I don't really believe that it is achievable, but the US Navy published some intriguing patents: * Craft using an inertial mass reduction device [1] * High fr

I don't really believe that it is achievable, but the US Navy published some intriguing patents: * Craft using an inertial mass reduction device [1] * High frequency gravitational wave generator [2] * Piezoelectricity-induced Room Temperature Superconductor [3] [1] https://patents.google.com/patent/US10144532B2 https://patents.google.com/patent/US10144532B2 [2] https://patents.google.com/patent/US10322827B2 https://patents.google.com/patent/US10322827B2 [3] https://patents.google.com/patent/US20190058105A1 https://patents.google.com/patent/US20190058105A1