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\begin{equation*}
\lambda^{(1)} = \frac{{J^0}^2+{J^1}^2}{2 U_{01}} - \frac{{J^0}^2}{ U_{00}}- \frac{{J^1}^2}{U_{11}} \,\,,\,\,\,
\lambda^{(2)}=- \frac{J^0 J^1}{U_{01}}  .
\end{equation*}
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