Look up the work by NASA and others on the Alcubierre Drive, a speculative method for travelling faster than light. The premise for the ongoing research is that FTL travel is possible as a matter of physics, if the necessary technology can be developed.
NASA shutdown the break through propulsion program.
I have a copy of the conference proceedings.
“...Alcubierre Drive, a speculative method for travelling faster than light ...”
Very speculative but intersting!
https://en.wikipedia.org/wiki/Alcubierre_drive
Wonderful if something came out of it!