Detection of gapped phases of a 1D spin chain with onsite and spatial symmetries
Abstract
We investigate the phase diagram of a quantum spin-1 chain whose Hamiltonian is invariant under a global onsite A4, translation and lattice inversion symmetries. We detect different gapped phases characterized by SPT order and symmetry breaking using matrix product state order parameters. We observe a rich variety of phases of matter characterized by a combination of symmetry breaking and symmetry fractionalization and also the interplay between the onsite and spatial symmetries. Examples of continuous phase transitions directly between topologically nontrivial SPT phases are also observed.
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