7 papers
Quartic level repulsion in a quantum chaotic three-body system without symplectic symmetry
Alex D. Kerin, Barbara Dietz, Joachim Brand
Among the fundamental symmetry classes of quantum chaotic systems in Dyson's threefold way, the symplectic class is rarely observed in nature. Characterized by the strongest possib…
Relativistic Quantum Chaos in Neutrino Billiards
Barbara Dietz
Neutrino billiards serve as a model system for the study of aspects of relativistic quantum chaos. These are relativistic quantum billiards consisting of a spin-1/2 particle which…
Nonrelativistic versus relativistic quantum scars in billiard systems
Barbara Dietz, Dung Xuan Nguyen, Tilen Äadež
We study the features of scarred eigenstates of relativistic neutrino billiards (NBs), graphene billiards (GBs) and Haldane graphene billiards (HGBs) and recapitulate those for non…
Universality Emerging in a Universality: Derivation of the Ericson Transition in Stochastic Quantum Scattering and Experimental Validation
Simon Köhnes, Jiongning Che, Barbara Dietz +1
At lower energies, the resonances in scattering experiments are often isolated. In quantum chaotic many-body, disordered or generically stochastic systems, the resonances overlap a…
Experimental study of coupled quantum billiards with integrable and chaotic classical dynamics and test of a special Rosenzweig-Porter model
Xiaodong Zhang, Jiongning Che, Barbara Dietz
We report on the experimental study of the spectral properties of quantum systems consisting of two quantum billiards (QBs), one with chaotic, the other one with integrable classic…
Experimental study of the distributions of off-diagonal scattering-matrix elements of quantum graphs with symplectic symmetry
Jiongning Che, Nils Gluth, Simon Köhnes +2
We report on experimental studies of the distribution of the off-diagonal elements of the scattering matrix of open microwave networks with symplectic symmetry and a chaotic wave d…