Quantum models with the Yang-Lee phase transition
Four different 1+1D quantum models—including spin chains, Schwinger model, Blume-Capel model, and a quantum clock model—are studied to realize the Yang-Lee phase transition under PT symmetry preservation. The research shows that in all these models, the critical point is described by a massless bosonic field with an iφ^3 interaction. Numerical results strongly agree with exact two-dimensional CFT predictions for criticality.