Narrow Results

The Darboux algorithm is applied to an exactly solvable one-dimensional stationary Dirac equation, with non-Hermitian, pseudoscalar interaction V₀(x). This generates a hierarchy of exactly solvable Dirac Hamiltonians, , defined by new non-Hermitian interactions V₁(x), which are also pseudoscalar. It is shown that are isospectral to the initial Hamiltonian h₀, except for certain missing states.