Phase diagram of the ${\mathbb{Z}}_3$-Fock parafermion chain with pair hopping

We study a tight binding model of ${\mathbb{Z}}_3$-Fock parafermions with single-particle and pair-hopping terms. The phase diagram has four different phases: a gapped phase, a gapless phase with central charge $c=2$, and two gapless phases with central charge $c=1$. We characterise each phase by analysing the energy gap, entanglement entropy and different correlation functions. The numerical simulations are complemented by analytical arguments.