186 citations · 611 across the 11 of their papers we have counts for
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Avoided level crossings in open quantum systems
Hichem Eleuch, Ingrid Rotter
At high level density, two states avoid usually crossing at the critical value of the parameter by which the system is controlled. The wavefunctions of the two sta…
Dynamical stabilization and time in open quantum systems
Ingrid Rotter
The meaning of time in an open quantum system is considered under the assumption that both, system and environment, are quantum mechanical objects. The Hamilton operator of the sys…
Exceptional points and double poles of the S matrix
I. Rotter
Exceptional points and double poles of the S matrix are both characterized by the coalescence of a pair of eigenvalues. In the first case, the coalescence causes a defect of the Hi…
Dynamics of quantum systems
I. Rotter
A relation between the eigenvalues of an effective Hamilton operator and the poles of the matrix is derived which holds for isolated as well as for overlapping resonance states…
Phase transitions in open quantum systems
C. Jung, M. Mueller, I. Rotter
We consider the behaviour of open quantum systems in dependence on the coupling to one decay channel by introducing the coupling parameter being proportional to the average deg…