Data di Pubblicazione:
2016
Citazione:
Enhanced estimation of loss in the presence of Kerr nonlinearity / M. Rossi, F. Albarelli, M.G.A. Paris. - In: PHYSICAL REVIEW A. - ISSN 2469-9926. - 93:5(2016 May 03), pp. 053805.1-053805.9. [10.1103/PhysRevA.93.053805]
Abstract:
We address the characterization of dissipative bosonic channels and show that estimation of the loss rate by Gaussian probes (coherent or squeezed) is improved in the presence of Kerr nonlinearity. In particular, enhancement of precision may be substantial for short interaction time, i.e., for media of moderate size, e.g., biological samples. We analyze in detail the behavior of the quantum Fisher information (QFI), and determine the values of nonlinearity maximizing the QFI as a function of the interaction time and of the parameters of the input signal. We also discuss the precision achievable by photon counting and quadrature measurement and present additional results for truncated, few-photon, probe signals. Finally, we discuss the origin of the precision enhancement, showing that it cannot be linked quantitatively to the non-Gaussianity or the nonclassicality of the interacting probe signal.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
dissipative oscillator; quantum statistics; sqeezed-state; superpositions; generation; noise; limit
Elenco autori:
M. Rossi, F. Albarelli, M.G.A. Paris
Link alla scheda completa:
Progetto: