Figure 3

Proposed random number generator. Design of the proposed quantum random number generator, for the \(N=4\) case. Only one more qubit is needed than in the comparator circuit. Three steps can be clearly distinguished: (1) the formation of a uniform superposition of all possible states with 4 qubits using Hadamard transform gates, (2) the oracle, consisting of applying the comparator circuit of Fig. 2, storing the result in the new qubit, and decomputing the circuit, and (3) the application of an amplitude amplification function