Ghosts in higher derivative Maxwell-Chern-Simon's theory and PT-symmetry

Scattering of the asymmetric $ϕ^6$ kinks from a $\mathcal{PT}$-symmetric perturbation: Creation of multiple pairs of kink-antikink from phonons

“…Many systems with PT -symmetry have been attracting increased attention in different branches within physics because they can exhibit various interesting features such as spontaneous PT -symmetry breaking [13][14][15], associated ghost states [16,17], wave chaos [18], heat and mass transfer [19], supersymmetry [20], microcavities [21] and exciton-polariton condensates [22][23][24].…”