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Found 13 Documents (Results 1–13)

On the bifurcation of thresholds of the essential spectrum with a spectral singularity. (English. Russian original) Zbl 1527.81055

Differ. Equ. 59, No. 2, 278-282 (2023); translation from Differ. Uravn. 59, No. 2, 270-274 (2023).
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Mathematical and physical meaning of the crossings of energy levels in \(\mathcal {PT}\)-symmetric systems. (English) Zbl 1402.81149

Bagarello, Fabio (ed.) et al., Non-Hermitian Hamiltonians in quantum physics. Selected contributions from the 15th international conference on non-Hermitian Hamiltonians in quantum physics, Palermo, Italy, May 18–23, 2015. Cham: Springer (ISBN 978-3-319-31354-2/hbk; 978-3-319-31356-6/ebook). Springer Proceedings in Physics 184, 201-217 (2016).
MSC:  81Q10 81Q12 46C05
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On a \(\mathcal{PT}\)-symmetric waveguide with a pair of small holes. (English. Russian original) Zbl 1321.47166

Proc. Steklov Inst. Math. 281, Suppl. 1, S5-S21 (2013); translation from Tr. Inst. Mat. Mekh. (Ekaterinburg) 18, No. 2, 22-37 (2012).
MSC:  47N50 81Q37
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