EPR pairs

• \(\ket{\beta_{00}} = \frac{\ket{00} + \ket{11}}{\sqrt{2}}\)
• \(\ket{\beta_{01}} = \frac{\ket{01} + \ket{10}}{\sqrt{2}}\)
• \(\ket{\beta_{10}} = \frac{\ket{00} - \ket{11}}{\sqrt{2}}\)
• \(\ket{\beta_{11}} = \frac{\ket{01} - \ket{10}}{\sqrt{2}}\)