124 citations · 473 across the 20 of their papers we have counts for
9 papers · 1 filter
Systematic Perturbation Theory for Dynamical Coarse-Graining
Gernot Schaller, Philipp Zedler, Tobias Brandes
We demonstrate how the dynamical coarse-graining approach can be systematically extended to higher orders in the coupling between system and reservoir. Up to second order in the co…
Preservation of Positivity by Dynamical Coarse-Graining
Gernot Schaller, Tobias Brandes
We compare different quantum Master equations for the time evolution of the reduced density matrix. The widely applied secular approximation (rotating wave approximation) applied i…
Entanglement detection via condition of quantum correlation
Che-Ming Li, Li-Yi Hsu, Yueh-Nan Chen +2
We develop a novel necessary condition of quantum correlation. It is utilized to construct -level bipartite Bell-type inequality which is strongly resistant to noise and require…
Correlation criteria for Bell type inequalities and entanglement detection
Che-Ming Li, Li-Yi Hsu, Wei-Yang Lin +3
We provide a novel criterion for identifying quantum correlation, which allows us to find connections between Bell type inequalities, entanglement detection, and correlation. We ut…
Entanglement in quantum catastrophes
Clive Emary, Neill Lambert, Tobias Brandes
We classify entanglement singularities for various two-mode bosonic systems in terms of catastrophe theory. Employing an abstract phase-space representation, we obtain exact result…
Entanglement and Entropy in a Spin-Boson Quantum Phase Transition
N. Lambert, C. Emary, T. Brandes
We investigate the entanglement properties of an ensemble of atoms interacting with a single bosonic field mode via the Dicke (superradiance) Hamiltonian. The model exhibits a quan…