Fig. 15: Sketch of the strategy used to attack the present problem.
From: Wannier states and spin supersolid physics in the triangular antiferromagnet K2Co(SeO3)2
\({{\mathcal{P}}}_{{\mathcal{W}}}\) represent the projection of the full Hamiltonian over the Wannier space to arrive to a low energy Hamiltonian \({{\mathcal{H}}}_{{\rm{eff}}}\), that is mapped by the unitary transformation U to an non-frustrated Hamiltonian \({\tilde{{\mathcal{H}}}}_{{\rm{eff}}}\). We promote \({\tilde{{\mathcal{H}}}}_{{\rm{eff}}}\) to \(\tilde{{\mathcal{H}}}\) in the complete Hilbert space and solve it using QMC.
