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quant-ph2012★ 12 cited
Schroedinger equations with indefinite effective mass
Miloslav Znojil, Géza Lévai
The consistency of the concept of quantum (quasi)particles possessing effective mass which is both position- and excitation-dependent is analyzed via simplified models. It is shown…
quant-ph2009★ 12 cited
Asymptotically vanishing PT-symmetric potentials and negative-mass Schroedinger equations
Miloslav Znojil, Petr Siegl, Géza Lévai
In paper I [M. Znojil and G. Lévai, Phys. Lett. A 271 (2000) 327] we introduced the Coulomb - Kratzer bound-state problem in its cryptohermitian, PT-symmetric version. An instabili…