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math-ph2006★ 93 cited
Closed formula for the metric in the Hilbert space of a PT-symmetric model
D. Krejcirik, H. Bila, M. Znojil
We introduce a very simple, exactly solvable PT-symmetric non-Hermitian model with real spectrum, and derive a closed formula for the metric operator which relates the problem to a…
math-ph2005
Comment on `Solution of the Dirac equation for the Woods-Saxon potential with spin and pseudospin symmetry' [J. Y. Guo and Z-Q. Sheng, Phys. Lett. A 338 (2005) 90]
H. Bila, V. Jakubsky, M. Znojil
Out of the four bound-state solutions presented in loc. cit., only one (viz., the spin-symmetric one, in the low-mass regime) is shown compatible with the physical boundary conditi…