Fig. 5: Example of experiment. | npj Quantum Information

Fig. 5: Example of experiment.

From: Experimental adaptive Bayesian estimation of multiple phases with limited data

Fig. 5

A typical estimation of two phases (red dots) is reported. a A uniform grid is generated as initial support for the prior distribution. bd Evolution of the posterior distribution during experiment for three subsequent moments. In particular, the distribution before and after the resampling are shown respectively in b and c, where particles are rearranged in order to eliminate zero weight cases. The new posterior weights are uniform, while particles are distributed closer to the estimated phases. In ad, particle colors represent the corresponding weight. e Study of standard deviation in estimation of the single phases (blue dashed lines) and their sum (red dashed lines). The saturation of their CRB (solid lines) occur for small N. f Experimental estimated pair of phases as function of the number N of adopted probes (dots). Dashed lines indicates true set values of the phases.

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