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Table 3

Comparison between the states of instantaneous and of secular equilibrium.

Instantaneous equilibria Secular equilibria


Config. Cond. σ UB Stable Config. Cond. σ ŪB Stable
+1 −2 yes ŝêz +1 +2 no
−1 −1 no ŝêz −1 +1 no
+1 +1 no ŝêz +1 −1 no
−1 +2 no ŝêz −1 −2 yes

Notes. Left side: the instantaneous equilibria require spins either parallel or perpendicular to the orbital separation . Right side: the secular equilibria require spins either parallel or perpendicular to the axis êz. The energies UB and ŪB are given in dimensionless units.

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