Classification of the conditionally observable spectra exhibiting central symmetry

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/156204We show how in PT-symmetric 2J-level quantum systems the assumption of an upside-down symmetry (or duality) of their spectra simplifies their classification based on the non-equivalent pairwise mergers of the energy levels.10 pp. 3 figuresMathematical Physics05A15; 46C20; 47B50; 81Q10Classification of the conditionally observable spectra exhibiting central symmetrytext