Figure 4
From: Simplified quantum optical Stokes observables and Bell’s theorem
(a) Quantum values of \(|M(3)_{G-}|\) expression (blue curve) and \(|M(3)_{S-}|\) (green dashed curve) as a function of the amplification gain \(\Gamma \) for BGHZ state. (b) Critical efficiency \(\eta _c\) versus \(\Gamma \) for Mermin inequalities for the BGHZ state. The blue curve represents \(\eta _c\) for the sign approach and a green dashed curve for normalized Stokes operators.
