All product eigenstates in Heisenberg models from a graphical construction
arXiv:2310.13158 · doi:10.1103/PhysRevResearch.7.L012008
Abstract
Recently, large degeneracy based on product eigenstates has been found in spin ladders, kagome-like lattices, and motif magnetism, connected to spin liquids, anyonic phases, and quantum scars. We unify these systems by a complete classification of product eigenstates of Heisenberg XXZ Hamiltonians with Dzyaloshinskii-Moriya interaction on general graphs in the form of Kirchhoff rules for spin supercurrent. By this, we construct spin systems with extensive degree of degeneracy linked to exotic condensates which could be studied in atomic gases and quantum spin lattices.
7 pages article, 7 pages supplemental material, 2 figures, 3 tables
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