Exact solution of a non-Hermitian $\mathcal{PT}$-symmetric Heisenberg spin chain

Pradip Kattel, Parameshwar R. Pasnoori, Natan Andrei

We construct the exact solution of a non-Hermitian $\mathcal{PT}$-symmetric isotropic Heisenberg spin chain with integrable boundary fields. We find that the system exhibits two ty…