Fig. 2: Error bounds for complex displacement and squeezing estimation, as a function of squeezing. | Communications Physics

Fig. 2: Error bounds for complex displacement and squeezing estimation, as a function of squeezing.

From: Efficiently evaluating Holevo, RLD and SLD Cramér-Rao bounds for multiparameter quantum estimation with Gaussian states

Fig. 2: Error bounds for complex displacement and squeezing estimation, as a function of squeezing.The alternative text for this image may have been generated using AI.

a Bounds obtained using a single-mode displaced squeezed thermal probe state. b Bounds obtained using a two-mode displaced squeezed thermal probe state. We do not show a curve for the upper bound \({\overline{C}}^{H}\) because it overlaps with the HCRB in this case.

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