Effective non-Hermitian physics for degenerate ground states of a nonHermitian Ising model with $\mathcal{R}\mathcal{T}$ symmetry

Can Wang, Meng-Lei Yang, Cui-Xian Guo +2

In this paper, based on a one-dimensional non-Hermitian spin model with $\mathcal{R}\mathcal{T}$-invariant term, we study the non-Hermitian physics for the two (nearly) degenerate ground sta…