Characteristic polynomial
$$\begin{equation}\left(\lambda + 2\right)^{4} \left(\lambda^{10} + 6 \lambda^{9} - 114 \lambda^{8} - 2562 \lambda^{7} - 26885 \lambda^{6} - 202056 \lambda^{5} - 1038868 \lambda^{4} - 3696417 \lambda^{3} - 8734667 \lambda^{2} - 11928859 \lambda - 6947603\right)\notag\end{equation}$$
Minimal polynomial
$$\begin{equation}\left(\lambda + 2\right)^{2} \left(\lambda^{10} + 6 \lambda^{9} - 114 \lambda^{8} - 2562 \lambda^{7} - 26885 \lambda^{6} - 202056 \lambda^{5} - 1038868 \lambda^{4} - 3696417 \lambda^{3} - 8734667 \lambda^{2} - 11928859 \lambda - 6947603\right)\notag\end{equation}$$
Quantum multiplication matrix
$$\begin{equation}\begin{pmatrix}0 & 4 & 6 & 10 & 30 & 36 & 24 & 42 & 18 & 42 & 192 & 80 & 144 & 420 \\ 1 & -1 & 1 & 2 & 4 & 6 & -2 & 14 & 6 & 10 & 15 & 9 & 6 & 48 \\ 1 & 0 & -1 & 2 & 4 & 10 & 6 & 8 & 2 & 12 & 39 & 18 & 27 & 96 \\ 1 & 1 & 2 & -1 & 2 & 4 & 4 & 4 & 2 & 6 & 51 & 21 & 39 & 96 \\ 0 & 1 & 1 & 0 & -2 & 2 & -1 & 2 & 0 & 3 & 4 & 2 & 2 & 0 \\ 0 & 1 & 0 & 1 & 2 & -2 & -1 & 1 & 1 & 0 & 2 & 0 & 2 & 0 \\ 0 & 1 & 0 & 0 & 1 & 2 & 0 & 0 & 0 & 2 & 14 & 6 & 10 & 18 \\ 0 & 0 & 1 & 1 & 1 & 0 & 1 & -2 & 0 & 0 & 4 & 0 & 6 & 18 \\ 0 & 0 & 1 & 0 & 0 & 0 & 0 & 2 & -1 & 1 & 10 & 4 & 8 & 18 \\ 0 & 0 & 0 & 1 & 0 & 1 & 1 & 2 & 1 & -1 & 2 & 2 & 0 & 18 \\ 0 & 0 & 0 & 0 & -6 & -4 & -12 & 14 & 6 & 7 & -15 & 1 & -21 & -36 \\ 0 & 0 & 0 & 0 & 10 & 6 & 15 & -13 & -5 & -7 & 19 & -2 & 28 & 54 \\ 0 & 0 & 0 & 0 & 5 & 5 & 9 & -8 & -4 & -2 & 12 & 1 & 14 & 30 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & \frac{7}{3} & 1 & \frac{5}{3} & 0\end{pmatrix}\notag\end{equation}$$