Qiskit, Quantum Computing, Grovers Algorithm, Quantum Algorithms, Algorithms.
a phenomenon called Phase Kickback occurs. The eigenvalue of the ‘ — ‘ state and the X Gate, which is ‘-1’ in this case, gets applied to all the control qubits. If you’re confused as to why, I’ve linked more resources in that Deutsch-Jozsa article, and I highly recommend taking a look! The part we