Antimatter

Antimatter is the opposite of matter. Bringing the two into conjunction is widely believed to produce a cataclysmic explosion.

Antimatter appears in science fiction continua, such as Star Trek, Doctor Who, etc., etc. If the PPC uses antimatter, they're keeping it very quiet. This is probably for the best.

If you are a physicist and this article's brevity and vagueness irritates you, please feel free to correct it. If you are curious about the matter of antimatter and are not a physicist, we suggest you Google it.