Data di Pubblicazione:
2010
Citazione:
Phase estimation in the presence of phase diffusion: the qubit case / B.T. Gebrehiwot, M. G. Genoni, S. Olivares, M. G. A. Paris. - In: PHYSICA SCRIPTA. - ISSN 0031-8949. - T140(2010), pp. 014062.014062.1-014062.014062.4.
Abstract:
In this paper we address the estimation of the phase shift imposed on a qubit in the presence of
phase diffusion. We evaluate the ultimate quantum limits to precision and determine optimal
probes and measurements achieving those bounds. We also analyse in detail the performances
of spin measurements and have found that although the corresponding Fisher information
depends on the unknown value of the phase shift, we may still achieve the ultimate bound
using a two-step adaptive method.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
B.T. Gebrehiwot, M. G. Genoni, S. Olivares, M. G. A. Paris
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