Quantum Bomb

I have thought up a theoretical weapon of my own design, it is the Quantum Bomb. it is a weapon that destroys anything within the blast radius from the space-time continuum, in all of time the destroyed objects never existed... ever. therefor, even though it should, theoretically, be POSSIBLE to make, it would be impossible to use. due to the fact that, once detonated, the bomb would destroy itself. this would create a paradox, the bomb would destroy itself in all of time/space. you know the drill... the bomb destroys its own existence, and the bomb can never be detonated, therefor it couldn't destroy itself in all time... ad infinitum. also, i think the universe would implode because of the aforementioned paradox.

No such bomb is possible.  You can't create a device that reaches into history and erases something from history.  If you could do that, you might as well go back in time and make yourself God, using your fancy gadgets.