365 Days of Astronomy has profiled the tachyon, a wonderful time traveling subatomic particle that moves faster than light and has a cool name. If the powerful Tachyon Cannon wasn't famous for its market value in the Gemini Sector, its inclusion on the F-103 Excalibur definitely brought it to the forefront. Scientist Craig Robertson has recorded a podcast that discuses some of the theory behind the physics. The Wing Commander series is later mentioned as using the concept in popular fiction. Check it out here.
The Tachyon cannon is one of my favorites. It packs a real wallop, rarely fails and it's one sleek design.