{|\psi^{+}\rangle _{00}} \bigl(-\sigma_{z}^{0}{|\chi\rangle _{0}}\bigr) + {|0\rangle _{c}}{|0\rangle _{d}}{|\psi^{-}\rangle _{00}} \bigl(-\mathbf{0}^{0}{|\chi\rangle _{0}}\bigr)\biggr).  \end{gathered}$$ 