Figure 9.

(Color online) (a,b) Oscillator strength and (c,d) the corresponding transition energies ΔE for the 1 → 2 (blue curves) and 1 → 3 (red curves) transitions between the intragap energy states of the kink-antink profile as function of (a,c) and (b,d) the external magnetic field B₀ (the energy levels are labeled by (1), (2), (3) in Fig. 5(a)). Dashed curves and solid curves in panels (a,c) display the results respectively for a zero and non-zero magnetic field. The insets in panels (a),(b) show the wavespinors of the levels (1) and (3) corresponding to the points with zero oscillator strength.