Figure 7

Performances for θ angle between 0 and π: (a) \(\eta _{H}^{A}\) (red), and \(\eta _{H}^{B}\) (blue), and (b) \(\eta _{V}^{A}\) (red), and \(\eta _{V}^{B}\) (blue). In both figures, the dotted black lines represent the ideal case, and ignoring the mentioned losses, near \(\theta = \pi / 4\), and \(3\pi / 4\) the three curves, in (a) and (b), practically coincide. Both in the case of the outcomes detected by the APDs of Alice and in the case of Bob, both figures show us that the performances comply with the following equalities: \(\eta _{H}^{A} + \eta _{V}^{A} = 1\), and \(\eta _{H}^{B} + \eta _{V}^{B} = 1\)