Is Faster-Than-Light Travel or Communication Possible? (1997)

Point 19 seems to conflate quantum fields with imaginary mass and superluminal particles. As far as I know, tachyonic quantum fields and tachyonic 'particles' are unrelated except for an unfortunate naming convention (historically, tachyonic fields were thought to result in tachyonic particles; the name was kept around even after the mistake had been realized). Note that tachyonic particles are not very particle-like at all, so I prefer the name 'tachyonic interaction': Tachyons cannot be properly localized…

The thing is that subjectively "FTL" travel, a la Star Trek, is totally possible thanks to special relativity contracting distances between objects. A little math shows the relative velocity in which you travel one light year measured in a rest frame, in one year in your spaceship's frame, is 70.7% of the speed of light. If you happened to be moving at the ludicrous speed of the "Oh-My-God" cosmic ray recorded in 1991, it would take you three seconds of…

Baez has a lot of cool stuff on his site. Whenever someone asks me "What happens when a flashlight is traveling at the speed of light and you turn it on?" (this happens more than you might think) I refer him to this page: http://math.ucr.edu/home/baez/physics/Relativity/SpeedOfLigh...