A quantum gate performs the superposition operation of a Grover's or of a Deutsch-Jozsa's quantum algorithm in a very fast manner. This is done by performing all multiplications by using logic gates that immediately outputs the result. The superposition operation includes performing the Hadamard rotation over an input set of vectors for producing a set of rotated vectors, and calculating the tensor product of all the rotated vectors for outputting a linear superposition set of vectors. The tensor product of all the rotated vectors is carried out by the logic gates.