58 citations · 206 across the 6 of their papers we have counts for
6 papers
Clustering of exceptional points and dynamical phase transitions
H. Eleuch, I. Rotter
The eigenvalues of a non-Hermitian Hamilton operator are complex and provide not only the energies but also the lifetimes of the states of the system. They show a non-analytical be…
Correlations in quantum systems and branch points in the complex plane
I. Rotter
Branch points in the complex plane are responsible for avoided level crossings in closed and open quantum systems. They create not only an exchange of the wave functions but also a…
Spectroscopic studies in open quantum systems
I. Rotter, E. Persson, K. Pichugin +1
The spectroscopic properties of an open quantum system are determined by the eigenvalues and eigenfunctions of an effective Hamiltonian H consisting of the Hamiltonian H_0 of the c…
Interfering resonances in a quantum billiard
E. Persson, K. Pichugin, I. Rotter +1
We present a method for numerically obtaining the positions, widths and wavefunctions of resonance states in a two dimensional billiard connected to a waveguide. For a rectangular…
Resonance trapping and saturation of decay widths
E. Persson, T. Gorin, I. Rotter
Resonance trapping appears in open many-particle quantum systems at high level density when the coupling to the continuum of decay channels reaches a critical strength. Here a reor…
Interfering Doorway States and Giant Resonances. II: Transition Strengths
V. V. Sokolov, I. Rotter, D. V. Savin +1
The mixing of the doorway components of a giant resonance (GR) due to the interaction via common decay channels influences significantly the distribution of the multipole strength…