Complex Spectrum of a Spontaneously Unbroken PT Symmetric Hamiltonian
Abstract
Description
It is believed that unbroken PT symmetry is sufficient to guarantee that the spectrum of a non-Hermitian Hamiltonian is real. We prove that this is not true. We study a Hamiltonian with complex spectrum for which PT symmetry is not spontaneously broken.
4 pages, no figures
4 pages, no figures