Quantum Computing, Quantum, Quantum Physics, Quantum Mechanics, Quantum Computer.
circuit of the correct size: qft_circ = qft(QuantumCircuit(n), n) # Then we take the inverse of this circuit invqft_circ = qft_circ.inverse() # And add it to the first n qubits in our existing circuit circuit.append(invqft_circ, circuit.qubits[:n]) return circuit.decompose() # .decompose() allows