Inside a box of size L we contemplate the simplest PT -symmetric piece-wise constant potential of size ℓ < L and purely imaginary strength ig and describe all its bound states in closed form.

Bijan Kumar Bagchi

Physics

(SoNS) School of Natural Sciences

H. Bíla

V. Jakubský

M. Znojil

S. Mallik

C. Quesne

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Shiv Nadar University

Czechoslovak Journal of Physics

Weakly non-Hermitian square well