Figure 4 | Scientific Reports

Figure 4

From: Theoretical investigation of dynamics and concurrence of entangled \({{\mathcal {P}}}{{\mathcal {T}}}\) and anti-\({{\mathcal {P}}}{{\mathcal {T}}}\) symmetric polarized photons

Figure 4

Using the Bell state \({|{B_{01}}\rangle }= \frac{1}{\sqrt{2}} \left( {|{01}\rangle } + {|{10}\rangle } \right)\) as the initial condition, we see the time evolution of the concurrence of the two qubits. (a) The dynamics of the concurrence in the \({{\mathcal {P}}}{{\mathcal {T}}}\) and \(\mathcal {APT}\)-symmetric systems. (b) The time evolution of concurrence in the \({{\mathcal {P}}}{{\mathcal {T}}}\) and \(\mathcal {APT}\)-symmetric systems when we take \(r_2 = 1.5\). (c) The dynamics of concurrence in the \({{\mathcal {P}}}{{\mathcal {T}}}\) and \(\mathcal {APT}\)-symmetric systems when we consider \(r_1 = 0.1\).

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