37 citations · 137 across the 7 of their papers we have counts for
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quant-ph2014★ 20 cited
Multiply Degenerate Exceptional Points and Quantum Phase Transitions
Denis I. Borisov, Frantisek Ruzicka, Miloslav Znojil
The realization of a genuine phase transition in quantum mechanics requires that at least one of the Kato's exceptional-point parameters becomes real. A new family of finite-dimens…
quant-ph2014★ 19 cited
Three solvable matrix models of a quantum catastrophe
Geza Levai, Frantisek Ruzicka, Miloslav Znojil
Three classes of finite-dimensional models of quantum systems exhibiting spectral degeneracies called quantum catastrophes are described in detail. Computer-assisted symbolic manip…