Exact ground states and topological order in interacting Kitaev/Majorana chains

Understand

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.