A

L1

${\lambda }_{\mathrm{1,2}}$

${\lambda }_{\mathrm{3,4}}$

0

0.837659

±2.93205

±2.33438 i

0.001

0.837799

±2.95411

±2.34699 i

A

L2

${\lambda }_{\mathrm{1,2}}$

${\lambda }_{\mathrm{3,4}}$

0

1.1551

±2.17167

±1.87026i

0.001

1.00501

±2.2905.

±1.93957i

A

L3

${\lambda }_{\mathrm{1,2}}$

${\lambda }_{\mathrm{3,4}}$

0

−1.1551

±0.276486

±1.02477i

0.001

−1.15476

±0.278137

±1.02144i