Estimation of qubit states in a factorizing basis
Hannemann, Th. · Reiss, D. · Balzer, Ch. · Neuhauser, W. · Toschek, P. E. · Wunderlich, Ch.
Original · EN
The optimal estimation of a quantum mechanical 2-state system (qubit) - with N identically prepared qubits available - is obtained by measuring all qubits simultaneously in an entangled basis. We report the experimental estimation of qubits using a succession of N measurements on individual qubits where the measurement basis is changed during the estimation procedure conditioned on the outcome of previous measurements (self-learning estimation). The performance of this adaptive algorithm is compared with other algorithms using measurements in a factorizing basis.
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