Figure 3 | Scientific Reports

Figure 3

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

Figure 3

The time evolution of the concurrence in (a) \({{\mathcal {P}}}{{\mathcal {T}}}\)-\({{\mathcal {P}}}{{\mathcal {T}}}\) symmetry-broken regime, (b) \(\mathcal {APT}\)-\(\mathcal {APT}\) symmetry-broken regime and (c) \({{\mathcal {P}}}{{\mathcal {T}}}\)-\(\mathcal {APT}\) symmetry-broken regimes by using different initial Bell states \({|{B_{00}}\rangle }= \frac{1}{\sqrt{2}} \left( {|{00}\rangle } + {|{11}\rangle } \right)\) and \({|{B_{01}}\rangle }= \frac{1}{\sqrt{2}} \left( {|{01}\rangle } + {|{10}\rangle } \right)\). We have taken different values of degree of non-Hermiticity (a) \(r_1 =r_2= 1.1\) for the same \({{\mathcal {P}}}{{\mathcal {T}}}\)-\({{\mathcal {P}}}{{\mathcal {T}}}\) symmetry-broken regime, (b) \(r_1 =r_2= 0.9\) for the same \(\mathcal {APT}\)-\(\mathcal {APT}\) symmetry-broken regime and (c) \(r_1 =1.1, r_2= 0.9\) for different \({{\mathcal {P}}}{{\mathcal {T}}}\)-\(\mathcal {APT}\) symmetry-broken regimes.

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