Qiskit, Quantum Computing, Computer Science, Deutsch Jozsa Algorithm, Quantum Algorithms.
we must be able to use the outputs, including the Query, to find our input. All of these Qubit states have the exact same probability of collapsing to 0 or 1. However, every one of them has a different Relative Phase. Luckily, Phase Kickback on a CX Gate doesn’t actually affect measurement of the