Quantum torpedo

In the fictional Star Trek universe, the quantum torpedo is a matter/anti-matter missile similar to the Photon Torpedo.

The quantum torpedo improves on the older weapon in its method of reaction. Instead of firing the deuterium slug into the anti-deuterium[?] containment chamber, the deuterium is phased into a state of quantum flux. The fluxed matter is then moved into the same space occupied by the anti-deuterium block. The deuterium is then rephased so that it is occupying the exact same physical space as the anti-deuterium. The two blocks are instantly annihilated creating the explosion.

This method of quantum flux ensures a thorough mixing of the opposing elements and a more efficient detonation cycle.

See also: Weapons of Star Trek