Fig. 6
Spin-wave modes and relative spin-length correction. a Magnon frequencies ω1–ω6 (in units of \(\left| K \right|S\)) from linear (dashed)16 and non-linear spin-wave theory (solid), above the classical states associated with the dimer pattern of Fig. 2a, inside the uniform flux sector \(B_{h_\alpha } = 1\) for all h α . b Relative spin length correction δS/S in the same sector, as extracted from non-linear spin-wave theory (NLSWT, blue circles) and exact diagonalizations (ED, dark yellow squares) of the Hamiltonian \({\cal H}_{{\mathrm{MF}}}\) discussed in the “Methods” section
