[3g4o53g4o5]

Well. FYI, unitary transformation, creation and annihilation operator, etc.

[tsimionescu]

Are these physical objects? Do they have mass, energy, volume, a position or speed, charge, color charge, weak hyper charge, spin etc?

[3g4o53g4o5]

The operation of adding and subtracting per se in classical computers also lacking these physical properties. If you use this as your counterargument, namely classical computer can compute without the inherent operation owning a physical property, then you left yourself with no ground of saying that quantum computing is invalid. You better check your logic.