Prof. Dr. Otfried Gühne

Nonlinear entanglement witnesses, covariance matrices and the geometry of separable states

Estimating entanglement measures in experiments

Quantum state tomography - Entanglement and purity,Tomografie Eines Quantenzustands - Verschränkung und Reinheit

Energy and multipartite entanglement in multidimensional and frustrated spin models

Generalized spin-squeezing inequalities in N -qubit systems: Theory and experiment

Entanglement of trapped ions

Entanglement criteria based on local uncertainty relations are strictly stronger than the computable cross norm criterion

Nonlinear entanglement witnesses

Detection of multipartite entanglement with two-body correlations

Entanglement verification for quantum-key-distribution systems with an underlying bipartite qubit-mode structure

Entanglement of trapped ions

Two-setting Bell inequalities for graph states