Exact ground states and topological order in interacting Kitaev/Majorana chains
Exact ground states and topological order in interacting Kitaev/Majorana chains
We study a system of interacting spinless fermions in one dimension which, in the absence of interactions, reduces to the Kitaev chain [A. Yu Kitaev, Phys.-Usp. \textbf{44}, 131 (2001)]. In the non-interacting case, a signal of topological order appears as zero-energy modes localized near the edges. We show that the …