Quantum-state estimation by self-learning measurements
Dietmar Fischer, Stefan H. Kienle, Matthias Freyberger · Physical Review A · 2000
We describe strategies for quantum-state estimation based on self-learning algorithms. In contrast to the optimal estimation procedures proposed earlier, our schemes rely on measurements performed separately on each quantum system in a finite ensemble. We numerically simulate our strategies in the case of finite ensembles of qubits and compare the resulting average fidelities to the fidelity of optimal quantum-state estimation.