Data di Pubblicazione:
2011
Citazione:
Optimized qubit phase estimation in noisy quantum channels / E. Tesio, S. Olivares, M. G A Paris. - In: INTERNATIONAL JOURNAL OF QUANTUM INFORMATION. - ISSN 0219-7499. - 9:Suppl. 1(2011), pp. 379-387. [10.1142/S0219749911007356]
Abstract:
We address the estimation of phase-shifts for qubit systems in the presence of noise. Different
sources of noise are considered including bit flip, bit-phase flip and phase flip. We derive the
ultimate quantum limits to precision of estimation by evaluating the analytical expressions of
the quantum Fisher information and assess performances of feasible measurements by evaluating
the Fisher information for realistic spin-like measurements. We also propose an experimental
scheme to test our results.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
quantum estimation ; qubit
Elenco autori:
E. Tesio, S. Olivares, M. G A Paris
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