Creating long-range entangled Majorana pairs: from spin-1/2 twisted Kitaev to generalized XY chains
The research investigates creating long-range entangled Majorana fermions in spin-1/2 Kitaev chains using specific pair pulse sequences applied to central unit cells. This method promotes long-distance spin correlations and maximal bipartite entanglement entropy. The technique is successfully extended to generalized XY chains and applied to the twisted Kitaev chain CoNb2O6, demonstrating robustness against perturbations.