Quantum Fourier Transform, Quantum Phase Estimation, Shors Algorithm, Quantum Computing, Qiskit.
see results of 0.3125 0.0625. We were expecting θ to be 0.333…., and we estimated 0.3125 with a 6.25% accuracy, which is pretty good. To increase the precision, we can add more counting qubits or use Iterative Phase Estimation (IPE) which is a variant of QPE and requires only one auxiliary qubit.